Enosburg Falls
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Enosburg Falls clear sky chart from 2005-11-06 to 2026-09-29.

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	17% 11% 4 9% 5% 5% 5% 4 5% 7% 27%	149521
	Night	17% 14% 5% 11% 6% 5% 4 3 4 5% 25%	141905
Transparency	Day	56% 7% 11% 17% 7% 1	152991
	Night	61% 6% 10% 15% 7% 1	146524
Seeing	Day	28% 18% 29% 17% 7% 2	17089
	Night	27% 15% 26% 23% 8% 1	25933

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% 8% 19% 7% 7% 4 2 3 3 11%	4661
	11th to 20th	Day	8% 17% 9% 22% 11% 6% 5% 3 4 4 11%	4650
	21st to end	Day	10% 17% 7% 12% 11% 13% 5% 3 4 5% 13%	5124
February	1st to 10th	Day	14% 16% 6% 16% 9% 6% 5% 3 4 5% 17%	1812
	11th to 20th	Day	13% 18% 7% 16% 8% 5% 4 3 4 5% 18%	2017
	21st to end	Day	13% 18% 8% 11% 8% 6% 4 2 5% 5% 20%	1730
March	1st to 10th	Day	19% 16% 7% 12% 6% 5% 5% 3 4 4 19%	4576
	11th to 20th	Day	13% 17% 4 10% 5% 5% 5% 4 6% 5% 26%	4752
	21st to end	Day	20% 13% 6% 11% 5% 4 4 3 5% 4 27%	6102
April	1st to 10th	Day	20% 17% 4 9% 5% 4 3 3 4 5% 26%	2520
	11th to 20th	Day	20% 13% 4 8% 5% 4 3 3 4 5% 31%	2494
	21st to end	Day	23% 11% 3 8% 4 4 4 3 5% 6% 29%	2721
May	1st to 10th	Day	27% 11% 3 8% 5% 5% 5% 4 5% 6% 20%	7871
	11th to 20th	Day	19% 8% 3 8% 6% 5% 6% 4 6% 7% 28%	8221
	21st to end	Day	22% 10% 3 6% 4 4 4 4 5% 7% 30%	9060
June	1st to 10th	Day	26% 7% 2 6% 5% 4 5% 4 6% 7% 28%	2940
	11th to 20th	Day	18% 6% 2 7% 4 5% 5% 4 7% 8% 33%	2940
	21st to end	Day	22% 8% 3 7% 5% 4 4 4 6% 8% 29%	2940
July	1st to 10th	Day	13% 6% 3 8% 5% 6% 6% 6% 8% 10% 30%	8280
	11th to 20th	Day	12% 6% 2 6% 4 5% 5% 4 6% 10% 39%	8280
	21st to end	Day	14% 7% 2 6% 4 4 4 4 6% 9% 39%	8993
August	1st to 10th	Day	16% 8% 3 8% 6% 5% 6% 5% 7% 7% 29%	6483
	11th to 20th	Day	17% 8% 3 8% 5% 5% 5% 4 6% 9% 31%	5825
	21st to end	Day	16% 7% 2 6% 3 4 5% 4 7% 9% 37%	6080
September	1st to 10th	Day	16% 8% 2 6% 4 4 4 4 5% 7% 42%	2520
	11th to 20th	Day	17% 6% 2 5% 3 4 4 3 5% 6% 46%	2389
	21st to end	Day	18% 7% 2 6% 4 5% 4 3 5% 8% 38%	2288
October	1st to 10th	Day	23% 9% 2 7% 5% 4 4 4 5% 6% 31%	2130
	11th to 20th	Day	21% 11% 2 7% 4 5% 5% 4 6% 6% 29%	1924
	21st to end	Day	25% 19% 3 8% 3 4 4 2 4 4 23%	1980
November	1st to 10th	Day	21% 16% 4 7% 5% 4 4 3 4 4 27%	1851
	11th to 20th	Day	17% 20% 5% 9% 5% 4 3 4 4 4 23%	1890
	21st to end	Day	20% 21% 7% 10% 5% 4 4 4 4 4 18%	1683
December	1st to 10th	Day	15% 21% 7% 22% 7% 5% 4 3 3 4 10%	2680
	11th to 20th	Day	17% 18% 7% 12% 5% 5% 4 3 4 5% 20%	3066
	21st to end	Day	18% 17% 4 13% 7% 5% 6% 3 4 5% 17%	4048
January	1st to 10th	Night	12% 22% 9% 19% 7% 5% 4 2 3 3 13%	8234
	11th to 20th	Night	11% 21% 9% 21% 8% 6% 5% 3 4 3 10%	8235
	21st to end	Night	11% 16% 6% 14% 12% 9% 5% 3 4 4 15%	9057
February	1st to 10th	Night	15% 18% 7% 17% 7% 5% 4 3 3 4 17%	2803
	11th to 20th	Night	13% 18% 7% 16% 8% 5% 4 3 4 4 19%	2489
	21st to end	Night	14% 17% 6% 13% 6% 5% 5% 3 4 4 24%	2076
March	1st to 10th	Night	18% 17% 6% 10% 7% 5% 4 2 4 4 23%	5484
	11th to 20th	Night	15% 17% 5% 10% 6% 5% 4 3 4 6% 25%	5423
	21st to end	Night	16% 20% 5% 12% 5% 4 3 3 3 3 25%	5072
April	1st to 10th	Night	22% 14% 5% 9% 4 4 4 4 5% 5% 26%	2100
	11th to 20th	Night	25% 12% 4 7% 5% 4 3 3 4 5% 29%	2075
	21st to end	Night	22% 13% 4 6% 4 4 3 3 4 5% 33%	1897
May	1st to 10th	Night	26% 12% 4 8% 4 4 5% 3 5% 6% 23%	5083
	11th to 20th	Night	21% 9% 3 8% 5% 5% 4 4 6% 7% 28%	4639
	21st to end	Night	19% 11% 3 8% 5% 4 4 3 5% 7% 31%	5114
June	1st to 10th	Night	26% 8% 3 6% 4 4 4 3 4 7% 30%	1680
	11th to 20th	Night	19% 7% 3 6% 4 5% 4 4 5% 8% 35%	1680
	21st to end	Night	21% 8% 2 6% 4 5% 5% 5% 6% 8% 29%	1680
July	1st to 10th	Night	16% 6% 3 8% 6% 6% 6% 4 7% 8% 31%	4680
	11th to 20th	Night	16% 6% 3 7% 4 4 4 3 6% 9% 39%	4680
	21st to end	Night	14% 8% 3 8% 6% 5% 5% 4 6% 8% 34%	5084
August	1st to 10th	Night	22% 9% 3 7% 5% 4 4 3 5% 7% 31%	3666
	11th to 20th	Night	18% 8% 3 8% 5% 5% 5% 3 6% 6% 31%	4156
	21st to end	Night	16% 7% 2 6% 4 4 5% 4 6% 7% 38%	5045
September	1st to 10th	Night	17% 7% 2 6% 3 4 4 4 6% 6% 41%	2100
	11th to 20th	Night	15% 6% 2 6% 4 3 4 3 5% 6% 46%	2231
	21st to end	Night	20% 7% 2 4 4 4 4 3 5% 6% 41%	2289
October	1st to 10th	Night	22% 8% 2 7% 4 3 3 3 6% 7% 34%	2268
	11th to 20th	Night	23% 11% 3 8% 5% 3 4 3 4 6% 30%	2475
	21st to end	Night	27% 14% 2 7% 5% 4 4 3 5% 5% 24%	2860
November	1st to 10th	Night	22% 14% 4 8% 4 4 4 3 4 5% 27%	2667
	11th to 20th	Night	19% 18% 5% 10% 4 3 3 3 4 5% 25%	2730
	21st to end	Night	20% 19% 6% 11% 5% 4 3 3 4 4 20%	2935
December	1st to 10th	Night	15% 26% 12% 16% 5% 4 4 3 3 3 10%	4720
	11th to 20th	Night	20% 21% 6% 14% 5% 4 4 2 3 3 17%	5348
	21st to end	Night	19% 19% 7% 12% 6% 5% 4 2 3 4 19%	7150

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	79% 5% 8% 7% 1	4662
	11th to 20th	Day	77% 7% 6% 6% 4 1	4680
	21st to end	Day	73% 5% 8% 8% 6%	5124
February	1st to 10th	Day	72% 4 7% 11% 5% 1	1812
	11th to 20th	Day	70% 5% 9% 11% 4	2026
	21st to end	Day	67% 5% 8% 12% 6% 1	1730
March	1st to 10th	Day	70% 6% 8% 7% 7% 3	4579
	11th to 20th	Day	57% 8% 13% 12% 8% 2	4752
	21st to end	Day	61% 5% 6% 13% 14% 1	6102
April	1st to 10th	Day	62% 5% 8% 17% 8% 1	2520
	11th to 20th	Day	56% 6% 6% 18% 12% 1	2494
	21st to end	Day	57% 7% 9% 16% 9% 2	2721
May	1st to 10th	Day	64% 8% 7% 15% 6%	7883
	11th to 20th	Day	53% 9% 13% 18% 6% 1	8225
	21st to end	Day	52% 8% 10% 22% 8%	9061
June	1st to 10th	Day	54% 7% 11% 19% 9%	2940
	11th to 20th	Day	47% 8% 12% 21% 11% 1	2940
	21st to end	Day	54% 7% 12% 19% 7% 1	2940
July	1st to 10th	Day	46% 9% 16% 22% 7%	8210
	11th to 20th	Day	40% 8% 14% 30% 8%	8205
	21st to end	Day	42% 8% 16% 28% 6%	8795
August	1st to 10th	Day	53% 8% 15% 16% 8%	6469
	11th to 20th	Day	51% 8% 17% 18% 6%	5864
	21st to end	Day	43% 9% 17% 21% 10% 1	6080
September	1st to 10th	Day	41% 7% 13% 29% 10% 1	2520
	11th to 20th	Day	39% 6% 12% 29% 14% 1	2389
	21st to end	Day	45% 7% 14% 22% 11% 2	2288
October	1st to 10th	Day	47% 6% 13% 25% 9%	3468
	11th to 20th	Day	54% 5% 13% 18% 8%	3114
	21st to end	Day	54% 5% 14% 20% 6% 1	3180
November	1st to 10th	Day	61% 6% 10% 16% 7%	1851
	11th to 20th	Day	64% 7% 9% 11% 7% 2	1890
	21st to end	Day	69% 6% 11% 10% 3	1683
December	1st to 10th	Day	81% 4 8% 6% 2	2680
	11th to 20th	Day	67% 6% 8% 14% 5%	3066
	21st to end	Day	70% 6% 6% 9% 8% 1	4048
January	1st to 10th	Night	78% 5% 9% 6% 1	8234
	11th to 20th	Night	79% 6% 7% 5% 3	8280
	21st to end	Night	74% 5% 7% 7% 7%	9057
February	1st to 10th	Night	72% 5% 7% 11% 5%	2803
	11th to 20th	Night	70% 6% 7% 12% 5%	2491
	21st to end	Night	64% 6% 8% 13% 8% 1	2076
March	1st to 10th	Night	66% 6% 9% 11% 7% 1	5494
	11th to 20th	Night	59% 8% 12% 12% 7% 1	5424
	21st to end	Night	65% 5% 5% 14% 10% 1	5072
April	1st to 10th	Night	60% 6% 8% 15% 9% 2	2100
	11th to 20th	Night	58% 6% 8% 17% 11%	2075
	21st to end	Night	54% 6% 8% 17% 13% 2	1897
May	1st to 10th	Night	61% 8% 10% 15% 6% 1	5089
	11th to 20th	Night	53% 9% 12% 19% 6% 1	4640
	21st to end	Night	52% 7% 10% 20% 11% 1	5115
June	1st to 10th	Night	54% 6% 9% 20% 10% 1	1680
	11th to 20th	Night	48% 7% 12% 21% 10% 2	1680
	21st to end	Night	50% 10% 13% 18% 10%	1680
July	1st to 10th	Night	51% 7% 13% 19% 9%	4640
	11th to 20th	Night	42% 7% 13% 29% 9%	4632
	21st to end	Night	46% 8% 15% 24% 7%	4967
August	1st to 10th	Night	54% 7% 15% 17% 8%	3656
	11th to 20th	Night	51% 8% 16% 18% 6%	4183
	21st to end	Night	44% 8% 16% 21% 11% 1	5045
September	1st to 10th	Night	42% 8% 14% 26% 10% 1	2100
	11th to 20th	Night	37% 6% 15% 30% 11%	2231
	21st to end	Night	43% 7% 12% 22% 13% 2	2289
October	1st to 10th	Night	53% 6% 9% 23% 9%	3710
	11th to 20th	Night	53% 5% 10% 20% 11%	4024
	21st to end	Night	56% 6% 13% 17% 8% 1	4610
November	1st to 10th	Night	59% 6% 11% 17% 6% 1	2667
	11th to 20th	Night	62% 6% 9% 13% 8% 2	2730
	21st to end	Night	69% 6% 10% 12% 3	2935
December	1st to 10th	Night	82% 5% 6% 6% 1	4720
	11th to 20th	Night	74% 5% 6% 9% 6%	5348
	21st to end	Night	70% 5% 6% 10% 7% 1	7150

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	30% 25% 30% 12% 3	220
	11th to 20th	Day	30% 26% 32% 7% 3	220
	21st to end	Day	26% 24% 34% 11% 4	242
February	1st to 10th	Day	37% 30% 25% 7% 1	290
	11th to 20th	Day	30% 27% 31% 9% 3	505
	21st to end	Day	32% 21% 33% 13% 1	446
March	1st to 10th	Day	32% 23% 29% 14% 3	540
	11th to 20th	Day	34% 25% 26% 12% 4	540
	21st to end	Day	38% 23% 22% 12% 5% 1	594
April	1st to 10th	Day	38% 19% 25% 13% 4 1	540
	11th to 20th	Day	38% 21% 22% 12% 5% 1	532
	21st to end	Day	31% 21% 29% 12% 5% 1	540
May	1st to 10th	Day	38% 19% 23% 12% 6% 1	543
	11th to 20th	Day	28% 17% 31% 16% 7% 2	567
	21st to end	Day	23% 21% 31% 19% 5% 1	617
June	1st to 10th	Day	29% 14% 31% 18% 6% 1	570
	11th to 20th	Day	24% 16% 31% 20% 7% 2	570
	21st to end	Day	27% 16% 33% 17% 6% 1	570
July	1st to 10th	Day	16% 15% 35% 24% 9% 1	565
	11th to 20th	Day	18% 11% 38% 23% 8% 2	564
	21st to end	Day	18% 11% 39% 23% 8% 1	620
August	1st to 10th	Day	17% 10% 30% 27% 14% 1	566
	11th to 20th	Day	20% 9% 32% 23% 13% 3	559
	21st to end	Day	19% 16% 27% 23% 11% 4	627
September	1st to 10th	Day	20% 15% 28% 20% 12% 5%	570
	11th to 20th	Day	19% 12% 24% 20% 19% 7%	570
	21st to end	Day	19% 13% 29% 23% 12% 4	562
October	1st to 10th	Day	25% 16% 25% 17% 14% 3	530
	11th to 20th	Day	32% 19% 22% 18% 8%	488
	21st to end	Day	39% 17% 25% 14% 5%	462
November	1st to 10th	Day	36% 19% 25% 15% 5%	425
	11th to 20th	Day	34% 21% 23% 15% 6% 1	430
	21st to end	Day	37% 24% 26% 12% 1	223
December	1st to 10th	Day	30% 24% 28% 16% 3	220
	11th to 20th	Day	34% 27% 31% 6% 1	220
	21st to end	Day	30% 29% 26% 12% 2	242
January	1st to 10th	Night	27% 24% 30% 16% 2	840
	11th to 20th	Night	29% 23% 29% 15% 4	840
	21st to end	Night	21% 20% 32% 21% 4 1	924
February	1st to 10th	Night	24% 20% 32% 20% 3	840
	11th to 20th	Night	25% 22% 33% 18% 2	823
	21st to end	Night	25% 20% 31% 22% 2	692
March	1st to 10th	Night	31% 17% 28% 20% 3	840
	11th to 20th	Night	31% 20% 26% 18% 5%	840
	21st to end	Night	30% 20% 25% 19% 6% 1	924
April	1st to 10th	Night	32% 16% 27% 21% 4	840
	11th to 20th	Night	34% 16% 23% 20% 6%	831
	21st to end	Night	31% 15% 29% 19% 6%	637
May	1st to 10th	Night	30% 12% 28% 21% 8% 1	570
	11th to 20th	Night	23% 11% 33% 25% 7% 1	414
	21st to end	Night	20% 11% 29% 31% 9%	455
June	1st to 10th	Night	29% 8% 25% 29% 9%	420
	11th to 20th	Night	22% 10% 24% 31% 11%	420
	21st to end	Night	21% 10% 23% 37% 9%	420
July	1st to 10th	Night	17% 6% 27% 37% 12% 1	410
	11th to 20th	Night	13% 6% 23% 43% 14% 1	408
	21st to end	Night	17% 5% 20% 44% 13%	460
August	1st to 10th	Night	17% 6% 18% 39% 20%	418
	11th to 20th	Night	16% 7% 23% 34% 19% 1	646
	21st to end	Night	20% 7% 20% 33% 18% 1	924
September	1st to 10th	Night	21% 6% 25% 32% 14% 1	840
	11th to 20th	Night	20% 6% 20% 28% 24% 2	840
	21st to end	Night	22% 9% 27% 23% 16% 2	833
October	1st to 10th	Night	26% 13% 22% 26% 12% 1	800
	11th to 20th	Night	29% 13% 23% 25% 9% 1	800
	21st to end	Night	36% 15% 26% 19% 4	880
November	1st to 10th	Night	32% 17% 25% 19% 6% 1	820
	11th to 20th	Night	29% 20% 25% 17% 8% 1	840
	21st to end	Night	34% 20% 26% 15% 4 1	840
December	1st to 10th	Night	34% 21% 26% 16% 4	840
	11th to 20th	Night	31% 22% 26% 16% 4	840
	21st to end	Night	33% 22% 24% 19% 3	924

Page generated at 2026-09-26 04:18:44. Version ac07

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