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 2025-05-26.

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	18% 12% 4 10% 5% 5% 5% 4 5% 6% 27%	113900
	Night	18% 15% 5% 11% 6% 5% 4 3 4 5% 25%	115377
Transparency	Day	57% 7% 11% 17% 7% 1	117416
	Night	62% 6% 10% 14% 7% 1	120025
Seeing	Day	28% 18% 28% 17% 7% 2	15318
	Night	27% 15% 26% 23% 8% 1	24348

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	14% 24% 9% 18% 6% 7% 3 2 3 3 12%	3597
	11th to 20th	Day	9% 17% 10% 22% 10% 5% 5% 3 4 4 11%	3570
	21st to end	Day	12% 20% 8% 12% 7% 11% 5% 3 4 5% 15%	3960
February	1st to 10th	Day	15% 16% 7% 16% 8% 6% 5% 2 4 4 16%	1725
	11th to 20th	Day	13% 19% 7% 16% 8% 5% 4 3 3 5% 18%	1918
	21st to end	Day	13% 19% 8% 11% 8% 6% 4 2 4 5% 21%	1650
March	1st to 10th	Day	19% 16% 8% 12% 6% 5% 5% 3 4 4 19%	4476
	11th to 20th	Day	13% 17% 4 10% 5% 5% 5% 4 6% 5% 26%	4649
	21st to end	Day	20% 13% 6% 11% 5% 4 4 3 5% 4 27%	5970
April	1st to 10th	Day	21% 17% 4 9% 5% 4 3 3 4 5% 26%	2400
	11th to 20th	Day	20% 13% 4 7% 4 4 3 3 4 5% 32%	2374
	21st to end	Day	24% 11% 3 8% 4 4 4 3 4 6% 29%	2591
May	1st to 10th	Day	25% 11% 3 7% 5% 4 5% 3 5% 6% 26%	4362
	11th to 20th	Day	19% 9% 3 9% 6% 5% 6% 4 6% 7% 27%	4538
	21st to end	Day	16% 7% 3 6% 5% 5% 5% 5% 7% 9% 33%	4907
June	1st to 10th	Day	27% 7% 2 6% 5% 5% 5% 4 6% 7% 27%	2660
	11th to 20th	Day	18% 6% 2 6% 4 5% 5% 4 7% 8% 34%	2660
	21st to end	Day	23% 8% 3 7% 5% 4 4 4 6% 7% 28%	2660
July	1st to 10th	Day	14% 6% 2 7% 5% 5% 6% 5% 7% 10% 33%	4440
	11th to 20th	Day	13% 7% 2 7% 5% 6% 6% 5% 7% 11% 31%	4440
	21st to end	Day	15% 7% 2 6% 5% 5% 5% 4 6% 8% 38%	4814
August	1st to 10th	Day	18% 8% 3 7% 5% 5% 5% 5% 7% 7% 29%	4423
	11th to 20th	Day	18% 8% 3 8% 5% 4 5% 4 5% 8% 32%	3962
	21st to end	Day	17% 7% 2 6% 3 4 5% 3 6% 8% 39%	4180
September	1st to 10th	Day	16% 8% 2 6% 4 4 4 4 5% 7% 41%	2280
	11th to 20th	Day	18% 6% 1 5% 3 4 3 3 5% 6% 45%	2161
	21st to end	Day	18% 7% 2 6% 4 5% 5% 3 6% 8% 37%	2090
October	1st to 10th	Day	24% 9% 3 7% 5% 4 4 4 5% 6% 28%	2024
	11th to 20th	Day	22% 11% 2 7% 4 5% 5% 4 6% 5% 29%	1828
	21st to end	Day	25% 19% 3 8% 3 4 4 2 4 4 24%	1881
November	1st to 10th	Day	21% 15% 4 7% 5% 4 4 3 5% 4 29%	1761
	11th to 20th	Day	18% 18% 5% 10% 5% 4 3 4 4 4 24%	1800
	21st to end	Day	20% 21% 6% 10% 5% 4 4 4 4 4 19%	1603
December	1st to 10th	Day	16% 21% 7% 22% 7% 4 4 2 3 3 10%	2600
	11th to 20th	Day	17% 18% 7% 12% 5% 5% 4 3 4 5% 20%	2986
	21st to end	Day	19% 17% 4 13% 7% 5% 6% 3 4 5% 17%	3960
January	1st to 10th	Night	13% 23% 10% 21% 7% 4 3 2 3 3 12%	6349
	11th to 20th	Night	10% 22% 9% 21% 7% 6% 5% 3 4 4 11%	6315
	21st to end	Night	13% 18% 6% 14% 8% 8% 5% 3 3 4 16%	6996
February	1st to 10th	Night	15% 19% 6% 17% 7% 5% 4 3 3 4 16%	2670
	11th to 20th	Night	13% 18% 6% 16% 8% 5% 4 3 4 4 19%	2368
	21st to end	Night	14% 18% 6% 13% 6% 5% 5% 2 4 4 24%	1980
March	1st to 10th	Night	18% 17% 6% 11% 7% 5% 4 2 4 4 22%	5364
	11th to 20th	Night	15% 17% 5% 9% 5% 4 4 3 4 6% 26%	5306
	21st to end	Night	16% 20% 5% 12% 5% 4 3 2 3 3 25%	4962
April	1st to 10th	Night	22% 14% 5% 9% 4 4 4 4 5% 5% 26%	2000
	11th to 20th	Night	25% 12% 4 7% 5% 4 3 3 4 5% 30%	1975
	21st to end	Night	23% 13% 4 6% 4 4 3 3 4 4 32%	1807
May	1st to 10th	Night	26% 11% 4 8% 5% 4 5% 3 5% 5% 25%	2828
	11th to 20th	Night	22% 9% 3 8% 5% 4 3 3 4 6% 32%	2575
	21st to end	Night	17% 7% 3 7% 5% 4 5% 4 6% 8% 35%	2784
June	1st to 10th	Night	27% 8% 3 6% 4 4 4 3 5% 7% 29%	1520
	11th to 20th	Night	18% 7% 2 6% 4 5% 4 4 6% 8% 35%	1520
	21st to end	Night	22% 8% 2 6% 4 5% 4 5% 7% 8% 29%	1520
July	1st to 10th	Night	16% 7% 3 8% 6% 5% 6% 3 6% 7% 34%	2520
	11th to 20th	Night	15% 8% 3 8% 5% 4 5% 3 6% 9% 34%	2520
	21st to end	Night	16% 8% 3 6% 5% 5% 5% 4 6% 7% 35%	2739
August	1st to 10th	Night	22% 9% 3 7% 4 4 4 3 5% 7% 32%	2506
	11th to 20th	Night	16% 8% 3 9% 6% 5% 5% 4 6% 6% 33%	2830
	21st to end	Night	18% 6% 2 6% 4 4 5% 3 5% 7% 41%	3476
September	1st to 10th	Night	17% 6% 2 6% 3 4 4 4 6% 6% 41%	1900
	11th to 20th	Night	16% 6% 2 5% 3 3 4 3 5% 6% 47%	2019
	21st to end	Night	21% 7% 2 4 4 4 4 3 5% 7% 41%	2090
October	1st to 10th	Night	22% 9% 2 8% 4 4 3 3 6% 7% 32%	2154
	11th to 20th	Night	23% 11% 3 8% 5% 4 4 4 4 6% 29%	2351
	21st to end	Night	27% 15% 2 7% 5% 4 4 3 5% 5% 24%	2717
November	1st to 10th	Night	22% 13% 4 8% 4 4 4 3 5% 5% 28%	2537
	11th to 20th	Night	19% 17% 5% 10% 4 4 3 3 4 5% 26%	2600
	21st to end	Night	21% 19% 6% 11% 5% 3 3 3 4 4 20%	2795
December	1st to 10th	Night	16% 26% 12% 16% 5% 4 4 3 3 2 9%	4580
	11th to 20th	Night	21% 21% 6% 13% 5% 4 4 2 3 3 17%	5208
	21st to end	Night	19% 19% 7% 12% 6% 5% 4 2 3 4 19%	6996

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	3598
	11th to 20th	Day	76% 8% 7% 6% 3 1	3600
	21st to end	Day	72% 5% 10% 9% 4	3960
February	1st to 10th	Day	72% 4 7% 10% 5% 1	1725
	11th to 20th	Day	71% 5% 9% 10% 4	1927
	21st to end	Day	66% 5% 8% 12% 7% 1	1650
March	1st to 10th	Day	70% 6% 8% 7% 7% 3	4479
	11th to 20th	Day	57% 8% 13% 12% 8% 2	4649
	21st to end	Day	61% 5% 6% 13% 14% 1	5970
April	1st to 10th	Day	61% 5% 8% 17% 8% 1	2400
	11th to 20th	Day	55% 6% 7% 19% 13% 1	2374
	21st to end	Day	58% 6% 10% 16% 9% 2	2591
May	1st to 10th	Day	57% 9% 8% 18% 7% 1	4376
	11th to 20th	Day	52% 12% 14% 15% 7% 1	4542
	21st to end	Day	43% 11% 13% 23% 10% 1	4907
June	1st to 10th	Day	55% 7% 11% 18% 8% 1	2660
	11th to 20th	Day	47% 8% 12% 21% 11% 1	2660
	21st to end	Day	55% 7% 12% 18% 7% 1	2660
July	1st to 10th	Day	44% 9% 15% 24% 9%	4370
	11th to 20th	Day	45% 10% 15% 26% 4	4365
	21st to end	Day	45% 8% 12% 28% 6%	4661
August	1st to 10th	Day	52% 8% 15% 18% 6%	4409
	11th to 20th	Day	50% 8% 18% 19% 5%	4001
	21st to end	Day	43% 7% 17% 19% 13% 1	4180
September	1st to 10th	Day	42% 7% 13% 27% 11% 1	2280
	11th to 20th	Day	40% 6% 12% 29% 13% 1	2161
	21st to end	Day	45% 8% 15% 22% 10% 1	2090
October	1st to 10th	Day	48% 6% 13% 25% 8%	3362
	11th to 20th	Day	55% 6% 14% 18% 8%	3018
	21st to end	Day	54% 5% 14% 20% 6% 1	3081
November	1st to 10th	Day	59% 6% 11% 16% 7%	1761
	11th to 20th	Day	64% 7% 9% 11% 8% 2	1800
	21st to end	Day	68% 6% 12% 10% 3	1603
December	1st to 10th	Day	81% 4 8% 5% 2	2600
	11th to 20th	Day	67% 6% 8% 14% 5%	2986
	21st to end	Day	70% 6% 6% 9% 8% 1	3960
January	1st to 10th	Night	80% 6% 9% 5% 1	6349
	11th to 20th	Night	77% 7% 8% 6% 2	6360
	21st to end	Night	73% 5% 8% 7% 7% 1	6996
February	1st to 10th	Night	73% 5% 7% 10% 5%	2670
	11th to 20th	Night	70% 6% 7% 12% 5%	2370
	21st to end	Night	65% 6% 8% 13% 8% 1	1980
March	1st to 10th	Night	67% 6% 9% 11% 7% 1	5374
	11th to 20th	Night	59% 8% 12% 13% 7% 1	5307
	21st to end	Night	64% 5% 5% 14% 10% 1	4962
April	1st to 10th	Night	60% 6% 9% 15% 9% 2	2000
	11th to 20th	Night	57% 6% 8% 17% 11%	1975
	21st to end	Night	55% 6% 8% 16% 13% 2	1807
May	1st to 10th	Night	58% 9% 9% 16% 8% 1	2834
	11th to 20th	Night	51% 9% 14% 17% 9% 1	2576
	21st to end	Night	44% 9% 14% 18% 14% 1	2785
June	1st to 10th	Night	55% 6% 10% 20% 9% 1	1520
	11th to 20th	Night	46% 7% 13% 21% 10% 2	1520
	21st to end	Night	51% 10% 13% 17% 9%	1520
July	1st to 10th	Night	49% 7% 12% 21% 11%	2480
	11th to 20th	Night	47% 8% 14% 25% 7%	2472
	21st to end	Night	47% 8% 13% 21% 10%	2651
August	1st to 10th	Night	52% 7% 14% 22% 6%	2496
	11th to 20th	Night	50% 8% 17% 17% 7%	2857
	21st to end	Night	43% 7% 14% 22% 13% 1	3476
September	1st to 10th	Night	42% 8% 13% 26% 11% 1	1900
	11th to 20th	Night	37% 6% 16% 30% 10%	2019
	21st to end	Night	42% 8% 12% 23% 13% 2	2090
October	1st to 10th	Night	54% 7% 9% 22% 8%	3596
	11th to 20th	Night	54% 5% 10% 20% 11%	3900
	21st to end	Night	55% 6% 13% 17% 8% 1	4467
November	1st to 10th	Night	58% 6% 11% 16% 7% 1	2537
	11th to 20th	Night	61% 6% 9% 14% 8% 2	2600
	21st to end	Night	69% 6% 10% 12% 3	2795
December	1st to 10th	Night	83% 5% 6% 5% 1	4580
	11th to 20th	Night	74% 5% 6% 9% 6%	5208
	21st to end	Night	70% 6% 6% 11% 7% 1	6996

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% 26% 28% 13% 4 1	200
	11th to 20th	Day	29% 26% 34% 8% 4 1	200
	21st to end	Day	25% 25% 34% 11% 5%	220
February	1st to 10th	Day	40% 30% 23% 6%	263
	11th to 20th	Day	32% 27% 30% 9% 2	466
	21st to end	Day	32% 21% 32% 14% 1	414
March	1st to 10th	Day	32% 22% 29% 15% 3	500
	11th to 20th	Day	32% 25% 27% 12% 4	500
	21st to end	Day	37% 22% 23% 12% 5% 1	550
April	1st to 10th	Day	38% 18% 25% 14% 4 1	500
	11th to 20th	Day	37% 21% 22% 13% 6% 1	492
	21st to end	Day	32% 20% 29% 13% 5% 1	500
May	1st to 10th	Day	37% 19% 23% 13% 6% 2	503
	11th to 20th	Day	26% 17% 31% 17% 7% 2	527
	21st to end	Day	21% 20% 32% 20% 5% 1	549
June	1st to 10th	Day	30% 13% 32% 17% 7% 1	490
	11th to 20th	Day	23% 15% 30% 21% 8% 2	490
	21st to end	Day	29% 15% 31% 18% 6% 1	490
July	1st to 10th	Day	16% 13% 34% 26% 10% 1	485
	11th to 20th	Day	18% 10% 38% 22% 9% 2	484
	21st to end	Day	17% 10% 39% 24% 8% 1	532
August	1st to 10th	Day	20% 10% 29% 26% 14% 1	486
	11th to 20th	Day	20% 8% 32% 23% 14% 3	479
	21st to end	Day	19% 16% 26% 23% 12% 5%	539
September	1st to 10th	Day	20% 14% 28% 20% 13% 5%	490
	11th to 20th	Day	20% 11% 22% 20% 20% 7%	490
	21st to end	Day	19% 13% 29% 23% 12% 5%	490
October	1st to 10th	Day	27% 16% 25% 16% 14% 3	490
	11th to 20th	Day	32% 17% 23% 18% 9%	452
	21st to end	Day	39% 16% 25% 15% 5%	429
November	1st to 10th	Day	34% 18% 26% 16% 6% 1	395
	11th to 20th	Day	35% 21% 22% 15% 6% 1	400
	21st to end	Day	34% 24% 28% 13% 1	203
December	1st to 10th	Day	30% 25% 28% 16% 3	200
	11th to 20th	Day	34% 25% 33% 7% 2	200
	21st to end	Day	30% 28% 27% 11% 3	220
January	1st to 10th	Night	27% 24% 30% 17% 2	800
	11th to 20th	Night	28% 22% 29% 16% 4	800
	21st to end	Night	21% 20% 33% 21% 4 1	880
February	1st to 10th	Night	26% 21% 32% 18% 3	800
	11th to 20th	Night	25% 22% 33% 18% 2	783
	21st to end	Night	25% 20% 30% 22% 2	660
March	1st to 10th	Night	31% 17% 28% 21% 3	800
	11th to 20th	Night	30% 20% 26% 18% 6%	800
	21st to end	Night	30% 19% 25% 19% 7% 1	880
April	1st to 10th	Night	32% 16% 27% 22% 4	800
	11th to 20th	Night	33% 16% 23% 21% 7%	791
	21st to end	Night	31% 15% 29% 19% 6%	607
May	1st to 10th	Night	30% 11% 28% 22% 8% 1	543
	11th to 20th	Night	23% 10% 33% 26% 8% 1	394
	21st to end	Night	20% 10% 29% 31% 10%	423
June	1st to 10th	Night	30% 7% 26% 27% 9% 1	380
	11th to 20th	Night	21% 8% 25% 34% 12% 1	380
	21st to end	Night	21% 10% 22% 37% 9% 1	380
July	1st to 10th	Night	16% 6% 26% 36% 14% 1	370
	11th to 20th	Night	12% 5% 23% 44% 15% 1	368
	21st to end	Night	18% 4 19% 46% 13%	416
August	1st to 10th	Night	18% 5% 19% 38% 19% 1	378
	11th to 20th	Night	17% 6% 23% 33% 19% 2	583
	21st to end	Night	20% 6% 20% 34% 19% 1	836
September	1st to 10th	Night	20% 6% 25% 32% 15% 1	760
	11th to 20th	Night	21% 6% 19% 28% 24% 2	760
	21st to end	Night	22% 10% 26% 24% 16% 2	760
October	1st to 10th	Night	26% 13% 22% 24% 13% 1	760
	11th to 20th	Night	29% 13% 22% 25% 9% 1	760
	21st to end	Night	36% 15% 26% 19% 4	836
November	1st to 10th	Night	31% 17% 26% 19% 6% 1	780
	11th to 20th	Night	29% 19% 25% 18% 8% 1	800
	21st to end	Night	35% 19% 26% 16% 5% 1	800
December	1st to 10th	Night	34% 21% 26% 16% 4	800
	11th to 20th	Night	31% 21% 26% 17% 5%	800
	21st to end	Night	32% 22% 24% 19% 3	880

Page generated at 2025-05-23 09:20:57. Version ac07

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