Kincardine
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kincardine clear sky chart from 2005-11-06 to 2025-07-06.

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	15% 12% 5% 10% 5% 4 4 3 5% 6% 30%	119706
	Night	15% 15% 6% 13% 6% 4 4 3 4 5% 24%	119102
Transparency	Day	55% 5% 11% 19% 10% 1	123294
	Night	61% 5% 10% 16% 8% 1	123674
Seeing	Day	20% 11% 28% 25% 12% 4	16042
	Night	22% 11% 28% 27% 11% 1	25345

By Month

Percentage Cloud Cover NE (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	13% 22% 12% 28% 8% 4 2 2 1 2 6%	3342
	11th to 20th	Day	9% 23% 12% 29% 13% 4 3 1 1 1 3	3658
	21st to end	Day	14% 18% 11% 24% 10% 7% 4 2 2 2 6%	4466
February	1st to 10th	Day	13% 21% 7% 17% 11% 5% 3 2 4 5% 13%	1800
	11th to 20th	Day	13% 16% 10% 20% 12% 4 4 3 4 3 12%	1753
	21st to end	Day	14% 17% 6% 13% 8% 5% 4 3 4 5% 19%	1645
March	1st to 10th	Day	15% 12% 6% 15% 8% 3 4 3 4 5% 26%	4746
	11th to 20th	Day	12% 15% 7% 10% 4 4 4 4 6% 7% 26%	4980
	21st to end	Day	18% 14% 6% 11% 5% 4 4 3 4 6% 25%	5465
April	1st to 10th	Day	17% 14% 5% 8% 4 4 4 3 5% 6% 29%	2299
	11th to 20th	Day	17% 10% 3 7% 4 3 4 3 5% 7% 37%	2572
	21st to end	Day	17% 9% 4 7% 4 4 4 3 5% 7% 36%	2600
May	1st to 10th	Day	16% 9% 3 6% 4 4 4 3 6% 7% 38%	5888
	11th to 20th	Day	13% 8% 3 7% 5% 4 4 4 5% 8% 38%	5952
	21st to end	Day	18% 9% 2 5% 3 3 3 3 5% 6% 42%	6949
June	1st to 10th	Day	12% 6% 2 7% 5% 5% 4 4 6% 8% 40%	2949
	11th to 20th	Day	10% 6% 2 6% 5% 5% 5% 4 6% 8% 43%	3000
	21st to end	Day	14% 7% 2 5% 5% 4 3 4 5% 8% 43%	3000
July	1st to 10th	Day	12% 6% 2 6% 4 4 5% 5% 8% 8% 41%	4836
	11th to 20th	Day	10% 5% 2 5% 3 4 4 4 6% 8% 49%	4544
	21st to end	Day	8% 5% 2 6% 4 4 4 4 7% 9% 47%	4466
August	1st to 10th	Day	12% 6% 2 6% 4 5% 5% 4 6% 9% 40%	4104
	11th to 20th	Day	13% 7% 2 6% 4 4 5% 4 6% 9% 40%	4044
	21st to end	Day	9% 5% 2 6% 4 4 5% 4 6% 9% 45%	4532
September	1st to 10th	Day	13% 7% 2 6% 4 4 5% 4 6% 8% 40%	2217
	11th to 20th	Day	14% 6% 2 5% 3 3 4 4 5% 8% 45%	2090
	21st to end	Day	17% 8% 3 7% 5% 4 4 4 6% 7% 35%	2090
October	1st to 10th	Day	21% 8% 2 7% 5% 4 4 3 5% 7% 33%	1949
	11th to 20th	Day	24% 14% 4 9% 5% 5% 5% 4 5% 6% 21%	1900
	21st to end	Day	30% 17% 4 8% 4 4 4 3 3 5% 17%	2000
November	1st to 10th	Day	18% 22% 3 8% 6% 4 4 3 4 4 23%	1762
	11th to 20th	Day	17% 23% 6% 11% 4 5% 3 3 4 5% 17%	1614
	21st to end	Day	21% 31% 8% 11% 5% 3 3 2 2 4 10%	1600
December	1st to 10th	Day	17% 38% 11% 15% 5% 3 3 2 1 2 3	2600
	11th to 20th	Day	20% 25% 9% 21% 5% 3 3 2 3 3 6%	2818
	21st to end	Day	27% 23% 9% 13% 6% 4 3 3 3 3 7%	3476
January	1st to 10th	Night	13% 22% 12% 32% 6% 4 2 1 2 2 4	6609
	11th to 20th	Night	12% 22% 11% 29% 13% 4 2 1 2 2 3	6227
	21st to end	Night	13% 18% 9% 24% 7% 7% 5% 2 3 3 7%	6490
February	1st to 10th	Night	13% 22% 7% 18% 10% 5% 3 3 4 4 11%	2600
	11th to 20th	Night	14% 17% 9% 18% 9% 5% 4 3 3 4 14%	2533
	21st to end	Night	16% 15% 7% 14% 7% 5% 4 4 5% 5% 20%	1980
March	1st to 10th	Night	14% 13% 5% 12% 7% 4 4 4 4 6% 27%	5092
	11th to 20th	Night	9% 14% 6% 9% 5% 5% 5% 4 6% 7% 30%	4979
	21st to end	Night	20% 12% 6% 12% 5% 3 4 3 4 4 26%	5467
April	1st to 10th	Night	20% 12% 5% 8% 5% 3 4 2 4 5% 30%	2115
	11th to 20th	Night	19% 9% 3 7% 4 5% 4 3 4 7% 36%	1777
	21st to end	Night	18% 11% 4 7% 5% 4 5% 4 5% 5% 32%	1800
May	1st to 10th	Night	17% 9% 3 8% 5% 4 5% 3 4 7% 36%	4053
	11th to 20th	Night	13% 9% 3 8% 5% 4 4 3 5% 6% 40%	3925
	21st to end	Night	19% 6% 2 5% 4 4 3 3 4 7% 41%	3926
June	1st to 10th	Night	15% 7% 2 5% 5% 4 4 4 6% 9% 39%	1447
	11th to 20th	Night	11% 6% 2 6% 5% 4 6% 4 7% 10% 38%	1400
	21st to end	Night	13% 6% 3 6% 4 5% 5% 3 6% 8% 41%	1400
July	1st to 10th	Night	8% 7% 3 8% 4 4 4 2 5% 8% 47%	2245
	11th to 20th	Night	11% 4 2 4 4 4 4 4 6% 7% 50%	2423
	21st to end	Night	7% 7% 2 5% 4 3 5% 4 7% 7% 48%	3083
August	1st to 10th	Night	11% 6% 3 8% 4 5% 4 4 6% 7% 43%	2825
	11th to 20th	Night	12% 7% 3 7% 4 4 4 4 5% 8% 42%	2785
	21st to end	Night	10% 6% 2 6% 4 4 5% 3 4 8% 47%	3124
September	1st to 10th	Night	12% 6% 3 6% 4 4 4 4 6% 7% 45%	1942
	11th to 20th	Night	12% 5% 2 6% 3 4 4 3 5% 8% 49%	2090
	21st to end	Night	17% 8% 4 8% 4 4 5% 4 4 6% 36%	2090
October	1st to 10th	Night	18% 8% 3 8% 5% 4 4 3 5% 6% 36%	2230
	11th to 20th	Night	26% 13% 4 9% 5% 4 3 2 5% 7% 21%	2280
	21st to end	Night	27% 16% 4 9% 4 4 4 3 4 5% 18%	2593
November	1st to 10th	Night	20% 18% 4 9% 4 4 3 3 4 6% 24%	2536
	11th to 20th	Night	20% 22% 6% 11% 5% 4 4 3 4 4 16%	2785
	21st to end	Night	23% 26% 8% 12% 5% 3 3 2 3 4 12%	2800
December	1st to 10th	Night	17% 31% 12% 17% 5% 4 3 2 3 2 5%	4580
	11th to 20th	Night	13% 28% 11% 18% 7% 4 3 2 3 2 8%	5369
	21st to end	Night	22% 23% 10% 15% 7% 4 3 3 4 3 7%	7502

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	87% 3 6% 3 1	3343
	11th to 20th	Day	92% 3 2 2 1	3689
	21st to end	Day	86% 3 6% 4 1	4466
February	1st to 10th	Day	77% 4 8% 10% 1	1800
	11th to 20th	Day	78% 4 6% 8% 3	1762
	21st to end	Day	68% 4 10% 13% 5%	1645
March	1st to 10th	Day	63% 4 13% 14% 6%	4749
	11th to 20th	Day	56% 5% 12% 19% 6% 1	4980
	21st to end	Day	61% 5% 10% 15% 8% 1	5465
April	1st to 10th	Day	57% 5% 9% 19% 10%	2299
	11th to 20th	Day	48% 5% 9% 23% 14% 1	2572
	21st to end	Day	48% 6% 12% 20% 12% 2	2600
May	1st to 10th	Day	45% 6% 12% 18% 14% 5%	5897
	11th to 20th	Day	45% 5% 14% 20% 16% 1	5956
	21st to end	Day	44% 4 11% 21% 16% 5%	6949
June	1st to 10th	Day	41% 6% 12% 25% 15% 1	2949
	11th to 20th	Day	37% 6% 12% 27% 17% 1	3000
	21st to end	Day	40% 7% 14% 25% 14% 1	3000
July	1st to 10th	Day	39% 5% 17% 21% 16% 2	4762
	11th to 20th	Day	32% 5% 13% 37% 12% 1	4465
	21st to end	Day	32% 5% 15% 28% 18% 2	4324
August	1st to 10th	Day	40% 6% 13% 25% 14% 1	4091
	11th to 20th	Day	41% 6% 17% 27% 10%	4083
	21st to end	Day	35% 5% 15% 32% 12% 1	4531
September	1st to 10th	Day	41% 7% 14% 25% 11% 2	2217
	11th to 20th	Day	38% 6% 14% 28% 14% 1	2090
	21st to end	Day	48% 7% 13% 23% 8% 1	2090
October	1st to 10th	Day	46% 5% 12% 26% 9% 1	3235
	11th to 20th	Day	52% 5% 11% 22% 9%	3140
	21st to end	Day	63% 4 12% 16% 4	3276
November	1st to 10th	Day	64% 4 9% 16% 6%	1762
	11th to 20th	Day	69% 5% 11% 8% 6% 1	1614
	21st to end	Day	80% 4 8% 7% 1	1600
December	1st to 10th	Day	91% 3 4 2 1	2600
	11th to 20th	Day	84% 3 6% 6% 1	2817
	21st to end	Day	82% 4 7% 6% 1	3476
January	1st to 10th	Night	88% 3 5% 3	6609
	11th to 20th	Night	90% 2 4 3 1	6271
	21st to end	Night	79% 7% 8% 4 2	6490
February	1st to 10th	Night	78% 4 8% 9% 1	2600
	11th to 20th	Night	74% 5% 10% 10% 2	2535
	21st to end	Night	65% 5% 12% 12% 6%	1980
March	1st to 10th	Night	58% 5% 13% 16% 7% 1	5102
	11th to 20th	Night	52% 4 15% 19% 8% 1	4980
	21st to end	Night	62% 4 8% 16% 9% 1	5467
April	1st to 10th	Night	56% 5% 8% 19% 11% 1	2115
	11th to 20th	Night	49% 5% 8% 20% 18% 1	1777
	21st to end	Night	53% 5% 8% 17% 15% 2	1800
May	1st to 10th	Night	48% 4 9% 17% 14% 8%	4060
	11th to 20th	Night	44% 6% 10% 22% 17% 2	3926
	21st to end	Night	44% 4 10% 25% 15% 3	3927
June	1st to 10th	Night	41% 5% 11% 24% 16% 3	1447
	11th to 20th	Night	39% 6% 12% 24% 17% 2	1400
	21st to end	Night	40% 6% 11% 24% 17% 2	1400
July	1st to 10th	Night	37% 4 11% 25% 18% 5%	2210
	11th to 20th	Night	32% 5% 12% 34% 16% 1	2379
	21st to end	Night	33% 6% 14% 25% 21% 2	2985
August	1st to 10th	Night	40% 5% 11% 29% 15% 1	2814
	11th to 20th	Night	41% 5% 15% 23% 15% 1	2812
	21st to end	Night	37% 5% 11% 33% 13% 1	3124
September	1st to 10th	Night	37% 6% 11% 29% 14% 2	1942
	11th to 20th	Night	35% 4 15% 29% 16% 1	2090
	21st to end	Night	48% 5% 12% 24% 10% 1	2090
October	1st to 10th	Night	40% 6% 10% 28% 16% 1	3724
	11th to 20th	Night	53% 4 14% 18% 10%	3779
	21st to end	Night	56% 4 16% 19% 6%	4267
November	1st to 10th	Night	60% 5% 11% 18% 5%	2536
	11th to 20th	Night	70% 4 10% 10% 4 1	2785
	21st to end	Night	78% 4 10% 7% 1	2800
December	1st to 10th	Night	87% 3 6% 3 1	4580
	11th to 20th	Night	81% 5% 7% 6% 1	5369
	21st to end	Night	81% 5% 7% 6% 1	7502

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	22% 20% 38% 12% 6% 1	240
	11th to 20th	Day	19% 20% 40% 15% 6%	300
	21st to end	Day	27% 18% 30% 22% 3	330
February	1st to 10th	Day	22% 24% 37% 14% 3	300
	11th to 20th	Day	21% 22% 41% 14% 2	300
	21st to end	Day	23% 29% 32% 14% 2	249
March	1st to 10th	Day	21% 20% 39% 13% 6%	413
	11th to 20th	Day	23% 17% 30% 23% 5% 1	500
	21st to end	Day	27% 13% 33% 21% 5% 1	550
April	1st to 10th	Day	25% 14% 34% 19% 8%	500
	11th to 20th	Day	27% 14% 29% 16% 9% 4	492
	21st to end	Day	24% 11% 31% 24% 9% 1	500
May	1st to 10th	Day	21% 9% 33% 24% 11% 2	503
	11th to 20th	Day	19% 8% 27% 27% 16% 4	527
	21st to end	Day	18% 7% 25% 27% 18% 5%	573
June	1st to 10th	Day	12% 9% 31% 33% 13% 1	679
	11th to 20th	Day	12% 7% 30% 34% 14% 3	730
	21st to end	Day	18% 6% 28% 34% 12% 2	730
July	1st to 10th	Day	10% 4 24% 34% 22% 5%	697
	11th to 20th	Day	13% 5% 26% 31% 19% 6%	668
	21st to end	Day	11% 4 21% 36% 20% 7%	532
August	1st to 10th	Day	12% 5% 22% 32% 21% 9%	486
	11th to 20th	Day	13% 4 19% 32% 20% 12%	479
	21st to end	Day	14% 5% 20% 32% 23% 7%	539
September	1st to 10th	Day	13% 8% 23% 30% 17% 8%	490
	11th to 20th	Day	12% 5% 19% 27% 24% 12%	490
	21st to end	Day	16% 10% 25% 26% 16% 8%	490
October	1st to 10th	Day	22% 10% 24% 23% 14% 6%	490
	11th to 20th	Day	27% 16% 31% 19% 6% 1	490
	21st to end	Day	35% 14% 29% 16% 4	449
November	1st to 10th	Day	28% 18% 29% 18% 7%	300
	11th to 20th	Day	27% 23% 32% 13% 4 2	206
	21st to end	Day	32% 21% 33% 15% 1	200
December	1st to 10th	Day	33% 19% 31% 15% 2 1	200
	11th to 20th	Day	32% 22% 30% 14% 3	200
	21st to end	Day	37% 19% 31% 10% 3	220
January	1st to 10th	Night	23% 20% 34% 17% 6% 1	1000
	11th to 20th	Night	28% 17% 33% 18% 4	963
	21st to end	Night	20% 14% 36% 24% 6% 1	880
February	1st to 10th	Night	23% 18% 34% 22% 3	800
	11th to 20th	Night	23% 16% 34% 21% 4 1	783
	21st to end	Night	21% 18% 35% 23% 3	660
March	1st to 10th	Night	20% 16% 36% 22% 6%	800
	11th to 20th	Night	18% 16% 36% 24% 5% 1	800
	21st to end	Night	23% 12% 29% 27% 9% 1	880
April	1st to 10th	Night	24% 13% 30% 26% 5%	785
	11th to 20th	Night	22% 12% 27% 28% 10% 2	593
	21st to end	Night	23% 10% 26% 31% 10% 1	600
May	1st to 10th	Night	17% 6% 30% 33% 12% 1	600
	11th to 20th	Night	19% 5% 22% 38% 15% 1	549
	21st to end	Night	15% 3 24% 40% 17% 1	433
June	1st to 10th	Night	17% 4 26% 39% 14% 1	400
	11th to 20th	Night	13% 5% 28% 37% 17% 1	400
	21st to end	Night	15% 5% 23% 38% 17% 2	400
July	1st to 10th	Night	9% 2 19% 46% 22% 2	380
	11th to 20th	Night	10% 1 22% 37% 26% 4	488
	21st to end	Night	12% 3 15% 44% 25% 2	624
August	1st to 10th	Night	12% 2 14% 40% 30% 2	567
	11th to 20th	Night	10% 2 16% 36% 30% 5%	564
	21st to end	Night	14% 3 20% 34% 26% 3	627
September	1st to 10th	Night	12% 5% 21% 35% 19% 7%	741
	11th to 20th	Night	13% 3 18% 36% 24% 5%	760
	21st to end	Night	17% 8% 23% 32% 16% 5%	760
October	1st to 10th	Night	22% 7% 26% 29% 15% 1	760
	11th to 20th	Night	32% 10% 24% 25% 9% 1	760
	21st to end	Night	34% 11% 29% 22% 3	836
November	1st to 10th	Night	31% 13% 24% 24% 7% 1	780
	11th to 20th	Night	28% 19% 29% 18% 6%	800
	21st to end	Night	34% 15% 29% 19% 3	800
December	1st to 10th	Night	34% 18% 28% 15% 4	800
	11th to 20th	Night	24% 20% 37% 15% 3	872
	21st to end	Night	33% 14% 33% 17% 3	1100

Page generated at 2025-07-03 01:30:18. Version ac07

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