Fisheating Creek Campgrounds
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Fisheating Creek Campgrounds clear sky chart from 2005-11-06 to 2026-07-31.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	7% 5% 2 7% 6% 6% 6% 5% 7% 10% 40%	137709
	Night	8% 6% 2 7% 5% 5% 5% 4 7% 9% 43%	135305
Transparency	Day	37% 8% 17% 21% 13% 4	141417
	Night	36% 8% 17% 21% 13% 4	139669
Seeing	Day	7% 4 16% 26% 26% 22%	18107
	Night	8% 3 18% 34% 28% 9%	28170

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	5% 5% 2 4 3 3 3 4 5% 8% 58%	5258
	11th to 20th	Day	15% 8% 3 7% 5% 4 5% 4 6% 8% 34%	5280
	21st to end	Day	13% 5% 2 7% 4 4 5% 3 6% 7% 43%	6079
February	1st to 10th	Day	9% 5% 2 5% 4 4 4 5% 6% 7% 49%	2100
	11th to 20th	Day	5% 4 2 4 4 4 4 4 6% 9% 54%	2052
	21st to end	Day	6% 4 2 4 5% 4 5% 4 5% 10% 51%	1903
March	1st to 10th	Day	5% 5% 2 7% 5% 6% 5% 5% 6% 8% 46%	5045
	11th to 20th	Day	3 3 1 4 4 4 3 3 5% 8% 64%	5090
	21st to end	Day	7% 3 2 6% 4 4 5% 4 6% 8% 50%	5586
April	1st to 10th	Day	4 3 2 5% 5% 5% 6% 4 8% 9% 48%	2310
	11th to 20th	Day	5% 5% 2 6% 5% 5% 5% 5% 7% 8% 47%	2317
	21st to end	Day	5% 4 1 5% 4 4 5% 5% 7% 10% 51%	2520
May	1st to 10th	Day	4 2 1 4 4 4 5% 4 7% 10% 54%	7080
	11th to 20th	Day	6% 5% 2 6% 5% 5% 5% 5% 7% 11% 44%	7626
	21st to end	Day	4 4 2 7% 6% 6% 7% 5% 9% 13% 39%	8391
June	1st to 10th	Day	14% 9% 3 10% 7% 6% 7% 6% 7% 9% 22%	2730
	11th to 20th	Day	8% 7% 3 11% 7% 8% 8% 6% 9% 11% 24%	2730
	21st to end	Day	8% 7% 3 10% 10% 8% 9% 6% 7% 10% 24%	2730
July	1st to 10th	Day	7% 6% 3 10% 8% 8% 7% 6% 8% 13% 24%	6030
	11th to 20th	Day	5% 6% 2 9% 8% 8% 8% 6% 9% 13% 26%	6030
	21st to end	Day	5% 5% 2 7% 6% 7% 7% 6% 9% 15% 31%	6554
August	1st to 10th	Day	4 7% 4 10% 8% 9% 9% 7% 9% 11% 23%	4234
	11th to 20th	Day	4 4 2 7% 6% 7% 8% 6% 9% 13% 34%	3803
	21st to end	Day	5% 6% 2 9% 6% 8% 8% 7% 11% 15% 23%	3949
September	1st to 10th	Day	7% 8% 3 11% 9% 8% 8% 7% 9% 11% 20%	2200
	11th to 20th	Day	7% 7% 4 10% 9% 8% 8% 5% 8% 11% 22%	2200
	21st to end	Day	10% 8% 3 10% 6% 6% 7% 5% 8% 10% 27%	2200
October	1st to 10th	Day	9% 5% 4 9% 6% 7% 7% 4 7% 10% 33%	2170
	11th to 20th	Day	7% 5% 2 7% 6% 6% 7% 5% 6% 10% 41%	2000
	21st to end	Day	7% 5% 2 7% 4 6% 5% 4 7% 9% 45%	2200
November	1st to 10th	Day	6% 5% 2 6% 4 4 5% 5% 7% 8% 48%	2057
	11th to 20th	Day	9% 6% 2 6% 5% 5% 5% 3 7% 8% 45%	2100
	21st to end	Day	7% 4 2 6% 5% 5% 5% 4 6% 7% 48%	2100
December	1st to 10th	Day	6% 3 1 4 3 3 3 3 5% 7% 60%	3027
	11th to 20th	Day	9% 6% 2 6% 5% 5% 5% 5% 7% 9% 42%	3463
	21st to end	Day	9% 6% 2 8% 6% 6% 6% 4 7% 10% 36%	4565
January	1st to 10th	Night	6% 4 1 5% 3 4 4 4 6% 8% 55%	7635
	11th to 20th	Night	15% 10% 4 9% 5% 5% 4 3 5% 6% 34%	7680
	21st to end	Night	12% 6% 2 6% 4 4 4 4 5% 7% 46%	8084
February	1st to 10th	Night	8% 6% 2 6% 4 5% 4 4 6% 8% 48%	2520
	11th to 20th	Night	7% 5% 2 5% 4 4 5% 3 6% 7% 52%	2452
	21st to end	Night	5% 4 2 5% 4 3 3 3 5% 8% 58%	1903
March	1st to 10th	Night	6% 6% 3 7% 5% 3 4 4 6% 8% 49%	5028
	11th to 20th	Night	5% 3 1 4 2 3 4 3 6% 9% 58%	5090
	21st to end	Night	8% 5% 2 6% 3 4 4 4 6% 8% 49%	5588
April	1st to 10th	Night	5% 3 1 5% 3 4 4 4 7% 9% 56%	2310
	11th to 20th	Night	4 4 1 4 5% 4 5% 4 6% 9% 53%	2250
	21st to end	Night	5% 5% 1 5% 4 3 4 4 6% 8% 56%	2100
May	1st to 10th	Night	6% 4 2 6% 5% 5% 5% 4 6% 8% 47%	5800
	11th to 20th	Night	8% 5% 2 7% 5% 4 4 4 6% 8% 48%	5234
	21st to end	Night	6% 4 2 7% 5% 5% 6% 6% 8% 11% 39%	5761
June	1st to 10th	Night	11% 8% 3 9% 6% 6% 7% 4 8% 8% 31%	1890
	11th to 20th	Night	7% 7% 2 8% 6% 6% 7% 6% 9% 14% 29%	1890
	21st to end	Night	6% 7% 3 9% 6% 6% 7% 6% 9% 11% 31%	1890
July	1st to 10th	Night	7% 7% 3 10% 7% 6% 8% 5% 8% 12% 26%	4148
	11th to 20th	Night	5% 6% 3 9% 6% 7% 7% 6% 10% 13% 29%	4147
	21st to end	Night	6% 6% 3 9% 6% 6% 6% 5% 8% 11% 34%	4517
August	1st to 10th	Night	4 6% 3 9% 6% 6% 6% 6% 8% 11% 33%	2915
	11th to 20th	Night	5% 5% 2 7% 5% 6% 7% 6% 9% 13% 35%	3203
	21st to end	Night	6% 5% 2 8% 6% 7% 8% 7% 10% 15% 26%	3949
September	1st to 10th	Night	7% 7% 3 9% 7% 7% 8% 6% 9% 12% 26%	2200
	11th to 20th	Night	9% 8% 3 9% 6% 7% 7% 5% 8% 10% 28%	2200
	21st to end	Night	11% 8% 3 8% 7% 6% 5% 5% 8% 9% 28%	2200
October	1st to 10th	Night	11% 7% 2 7% 5% 5% 5% 4 7% 9% 38%	2227
	11th to 20th	Night	8% 6% 3 6% 4 5% 5% 4 6% 8% 46%	2400
	21st to end	Night	8% 5% 2 6% 4 4 4 4 6% 9% 48%	2640
November	1st to 10th	Night	8% 5% 2 6% 4 4 5% 4 6% 8% 50%	2461
	11th to 20th	Night	6% 6% 2 6% 5% 5% 4 4 6% 8% 48%	2520
	21st to end	Night	8% 5% 2 5% 4 3 4 4 6% 9% 50%	2520
December	1st to 10th	Night	6% 3 1 4 3 3 3 3 4 7% 62%	4368
	11th to 20th	Night	10% 7% 2 6% 4 4 4 3 4 7% 48%	4952
	21st to end	Night	10% 8% 3 8% 6% 5% 6% 5% 7% 8% 34%	6633

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	26% 4 8% 29% 26% 7%	5259
	11th to 20th	Day	47% 5% 10% 19% 13% 6%	5280
	21st to end	Day	40% 4 7% 27% 14% 8%	6079
February	1st to 10th	Day	32% 6% 12% 19% 22% 10%	2100
	11th to 20th	Day	25% 5% 10% 27% 23% 11%	2062
	21st to end	Day	28% 6% 11% 20% 23% 12%	1903
March	1st to 10th	Day	34% 8% 11% 19% 22% 7%	5045
	11th to 20th	Day	19% 6% 11% 24% 22% 18%	5090
	21st to end	Day	31% 5% 9% 28% 19% 9%	5586
April	1st to 10th	Day	28% 8% 14% 27% 17% 6%	2310
	11th to 20th	Day	31% 7% 12% 20% 21% 9%	2317
	21st to end	Day	25% 7% 12% 23% 26% 6%	2520
May	1st to 10th	Day	24% 4 17% 33% 19% 3	7112
	11th to 20th	Day	32% 7% 17% 30% 13% 2	7630
	21st to end	Day	33% 8% 23% 26% 10%	8405
June	1st to 10th	Day	56% 10% 16% 14% 4	2730
	11th to 20th	Day	48% 15% 19% 16% 2	2730
	21st to end	Day	52% 13% 21% 11% 2	2730
July	1st to 10th	Day	49% 11% 28% 12% 1	5965
	11th to 20th	Day	46% 11% 32% 11%	5961
	21st to end	Day	38% 12% 29% 20% 1	6370
August	1st to 10th	Day	49% 14% 27% 8% 2	4221
	11th to 20th	Day	36% 12% 29% 18% 5%	3842
	21st to end	Day	45% 14% 31% 9% 1	3949
September	1st to 10th	Day	53% 15% 19% 12% 1	2200
	11th to 20th	Day	51% 14% 19% 12% 3	2200
	21st to end	Day	50% 13% 16% 12% 7% 2	2200
October	1st to 10th	Day	53% 9% 15% 14% 7% 2	3534
	11th to 20th	Day	31% 6% 13% 26% 21% 3	3240
	21st to end	Day	32% 5% 10% 26% 21% 6%	3538
November	1st to 10th	Day	31% 7% 13% 21% 17% 11%	2057
	11th to 20th	Day	35% 6% 10% 19% 21% 8%	2100
	21st to end	Day	32% 6% 11% 22% 21% 7%	2100
December	1st to 10th	Day	24% 4 14% 27% 21% 10%	3027
	11th to 20th	Day	35% 5% 12% 21% 19% 8%	3460
	21st to end	Day	42% 6% 15% 20% 15% 2	4565
January	1st to 10th	Night	27% 5% 8% 32% 21% 7%	7636
	11th to 20th	Night	51% 4 10% 18% 11% 5%	7680
	21st to end	Night	38% 4 9% 27% 16% 6%	8084
February	1st to 10th	Night	33% 7% 11% 19% 19% 10%	2520
	11th to 20th	Night	29% 6% 9% 25% 23% 8%	2453
	21st to end	Night	26% 5% 12% 20% 29% 9%	1903
March	1st to 10th	Night	32% 7% 12% 21% 22% 6%	5028
	11th to 20th	Night	20% 7% 15% 25% 17% 15%	5090
	21st to end	Night	32% 5% 12% 24% 22% 5%	5588
April	1st to 10th	Night	23% 7% 17% 32% 15% 6%	2310
	11th to 20th	Night	26% 9% 14% 22% 23% 6%	2250
	21st to end	Night	25% 7% 12% 28% 23% 5%	2100
May	1st to 10th	Night	32% 7% 17% 29% 12% 3	5830
	11th to 20th	Night	32% 7% 21% 29% 10%	5235
	21st to end	Night	35% 10% 24% 22% 9%	5771
June	1st to 10th	Night	48% 11% 19% 17% 5%	1890
	11th to 20th	Night	42% 15% 24% 17% 2	1890
	21st to end	Night	41% 15% 26% 14% 3	1890
July	1st to 10th	Night	48% 12% 30% 10%	4105
	11th to 20th	Night	45% 16% 29% 9%	4096
	21st to end	Night	42% 12% 27% 18% 1	4387
August	1st to 10th	Night	41% 14% 31% 11% 3	2904
	11th to 20th	Night	37% 14% 31% 16% 3	3230
	21st to end	Night	43% 18% 32% 7% 1	3949
September	1st to 10th	Night	46% 19% 22% 11% 1	2200
	11th to 20th	Night	47% 16% 20% 15% 2	2200
	21st to end	Night	49% 13% 17% 14% 7%	2200
October	1st to 10th	Night	56% 9% 15% 12% 7% 2	3643
	11th to 20th	Night	37% 6% 12% 22% 21% 3	3899
	21st to end	Night	33% 5% 10% 25% 22% 5%	4252
November	1st to 10th	Night	31% 6% 13% 20% 21% 9%	2461
	11th to 20th	Night	32% 7% 11% 23% 19% 8%	2520
	21st to end	Night	30% 7% 11% 23% 23% 7%	2520
December	1st to 10th	Night	23% 5% 14% 31% 15% 11%	4368
	11th to 20th	Night	36% 5% 11% 21% 19% 7%	4954
	21st to end	Night	44% 7% 16% 16% 13% 4	6633

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	7% 5% 37% 31% 17% 2	330
	11th to 20th	Day	11% 11% 33% 28% 14% 3	330
	21st to end	Day	13% 10% 40% 30% 7% 1	363
February	1st to 10th	Day	5% 10% 26% 33% 20% 6%	330
	11th to 20th	Day	6% 5% 29% 35% 20% 5%	334
	21st to end	Day	5% 6% 25% 34% 27% 3	446
March	1st to 10th	Day	4 7% 32% 35% 19% 3	540
	11th to 20th	Day	6% 6% 28% 32% 25% 3	540
	21st to end	Day	4 5% 23% 33% 30% 5%	594
April	1st to 10th	Day	4 6% 27% 36% 21% 5%	540
	11th to 20th	Day	5% 5% 22% 37% 24% 8%	532
	21st to end	Day	4 3 19% 36% 30% 9%	540
May	1st to 10th	Day	5% 1 14% 34% 33% 13%	543
	11th to 20th	Day	8% 3 17% 24% 31% 17%	567
	21st to end	Day	7% 2 6% 22% 34% 29%	617
June	1st to 10th	Day	13% 2 9% 23% 24% 28%	570
	11th to 20th	Day	7% 1 6% 16% 27% 42%	570
	21st to end	Day	6% 1 3 10% 25% 54%	570
July	1st to 10th	Day	6% 2 3 8% 23% 58%	565
	11th to 20th	Day	4 1 2 14% 27% 52%	564
	21st to end	Day	6% 1 3 16% 24% 50%	616
August	1st to 10th	Day	6% 1 4 13% 23% 54%	526
	11th to 20th	Day	3 1 3 10% 27% 55%	519
	21st to end	Day	8% 2 7% 19% 26% 39%	583
September	1st to 10th	Day	6% 2 4 13% 30% 45%	530
	11th to 20th	Day	7% 1 8% 15% 30% 40%	530
	21st to end	Day	7% 2 6% 20% 32% 33%	530
October	1st to 10th	Day	11% 2 12% 32% 30% 13%	530
	11th to 20th	Day	7% 2 16% 31% 32% 11%	530
	21st to end	Day	7% 4 19% 32% 29% 9%	583
November	1st to 10th	Day	7% 6% 19% 30% 28% 10%	535
	11th to 20th	Day	11% 4 20% 35% 24% 6%	540
	21st to end	Day	7% 3 22% 35% 29% 4	540
December	1st to 10th	Day	7% 5% 29% 34% 20% 4	337
	11th to 20th	Day	8% 6% 30% 34% 18% 5%	330
	21st to end	Day	6% 6% 25% 35% 21% 6%	363
January	1st to 10th	Night	8% 5% 26% 42% 18% 1	840
	11th to 20th	Night	10% 6% 29% 41% 12% 1	840
	21st to end	Night	12% 5% 32% 40% 10%	924
February	1st to 10th	Night	12% 6% 28% 40% 15%	840
	11th to 20th	Night	7% 6% 26% 45% 14% 1	823
	21st to end	Night	8% 4 26% 49% 14%	692
March	1st to 10th	Night	4 4 33% 44% 14% 1	840
	11th to 20th	Night	6% 5% 27% 44% 17%	840
	21st to end	Night	4 4 28% 47% 16% 1	924
April	1st to 10th	Night	6% 4 24% 48% 18%	840
	11th to 20th	Night	5% 3 27% 48% 16% 1	831
	21st to end	Night	6% 2 24% 48% 20%	840
May	1st to 10th	Night	4 1 18% 47% 28% 2	833
	11th to 20th	Night	6% 1 14% 45% 30% 3	621
	21st to end	Night	6% 1 7% 33% 45% 8%	683
June	1st to 10th	Night	11% 2 7% 27% 43% 11%	630
	11th to 20th	Night	7% 2 3 16% 48% 24%	630
	21st to end	Night	7% 4 12% 44% 32%	630
July	1st to 10th	Night	7% 1 3 8% 46% 35%	615
	11th to 20th	Night	4 2 2 9% 46% 37%	612
	21st to end	Night	5% 1 2 9% 45% 38%	687
August	1st to 10th	Night	5% 1 5% 10% 43% 37%	597
	11th to 20th	Night	6% 2 3 9% 44% 37%	694
	21st to end	Night	12% 1 7% 16% 39% 25%	880
September	1st to 10th	Night	10% 2 5% 15% 43% 25%	800
	11th to 20th	Night	11% 2 7% 19% 43% 19%	800
	21st to end	Night	15% 2 9% 21% 39% 15%	800
October	1st to 10th	Night	13% 2 11% 37% 31% 6%	800
	11th to 20th	Night	9% 3 12% 37% 35% 6%	800
	21st to end	Night	10% 2 19% 38% 28% 4	880
November	1st to 10th	Night	10% 3 20% 40% 26% 2	820
	11th to 20th	Night	6% 4 21% 42% 25% 2	840
	21st to end	Night	9% 2 22% 43% 23% 1	840
December	1st to 10th	Night	7% 4 22% 40% 27% 1	840
	11th to 20th	Night	9% 3 21% 41% 23% 2	840
	21st to end	Night	7% 5% 25% 40% 22% 2	924

Page generated at 2026-07-28 03:25:26. Version ac07

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