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 2024-11-02.

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 9% 5% 5% 5% 4 5% 6% 28%	101438
	Night	19% 14% 5% 10% 5% 4 4 3 4 5% 26%	97555
Transparency	Day	56% 8% 11% 17% 7% 1	101196
	Night	60% 7% 10% 15% 7% 1	97417
Seeing	Day	27% 17% 29% 17% 8% 2	14676
	Night	26% 15% 26% 24% 8% 1	23583

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	16% 22% 8% 14% 6% 6% 4 3 4 3 15%	2517
	11th to 20th	Day	12% 19% 8% 17% 9% 5% 5% 3 4 5% 13%	2520
	21st to end	Day	14% 22% 8% 13% 5% 8% 5% 3 4 5% 13%	2772
February	1st to 10th	Day	15% 16% 7% 15% 8% 6% 5% 2 4 5% 16%	1638
	11th to 20th	Day	13% 19% 7% 15% 7% 5% 4 3 3 4 18%	1819
	21st to end	Day	13% 18% 8% 11% 8% 6% 4 2 4 5% 21%	1570
March	1st to 10th	Day	22% 15% 5% 9% 6% 5% 4 3 4 5% 21%	3116
	11th to 20th	Day	14% 23% 5% 12% 6% 4 4 3 4 4 21%	3247
	21st to end	Day	18% 12% 5% 11% 4 4 3 2 4 4 32%	4166
April	1st to 10th	Day	21% 17% 4 8% 5% 3 3 3 4 5% 26%	2280
	11th to 20th	Day	20% 12% 4 7% 5% 4 3 3 4 6% 32%	2254
	21st to end	Day	24% 11% 3 8% 4 4 4 3 4 5% 29%	2461
May	1st to 10th	Day	25% 11% 3 7% 5% 4 5% 3 5% 5% 26%	4228
	11th to 20th	Day	19% 9% 3 9% 6% 5% 6% 5% 6% 7% 27%	4398
	21st to end	Day	15% 7% 3 7% 4 5% 5% 5% 7% 9% 34%	4837
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 28%	1681
	11th to 20th	Day	18% 18% 5% 10% 5% 5% 3 4 4 4 23%	1710
	21st to end	Day	19% 20% 6% 11% 5% 4 4 4 4 5% 20%	1523
December	1st to 10th	Day	21% 22% 7% 13% 6% 3 3 2 3 4 15%	1520
	11th to 20th	Day	20% 19% 7% 10% 4 5% 4 2 4 5% 20%	1906
	21st to end	Day	23% 18% 4 14% 8% 4 5% 3 4 4 14%	2772
January	1st to 10th	Night	15% 23% 9% 15% 6% 4 4 3 4 3 14%	4429
	11th to 20th	Night	12% 20% 7% 19% 7% 6% 5% 3 4 4 13%	4440
	21st to end	Night	17% 22% 7% 12% 7% 6% 4 2 3 4 18%	4884
February	1st to 10th	Night	16% 19% 6% 17% 7% 5% 4 3 3 4 16%	2537
	11th to 20th	Night	13% 18% 7% 15% 8% 5% 4 3 4 4 19%	2247
	21st to end	Night	14% 17% 6% 12% 6% 5% 5% 2 4 4 24%	1884
March	1st to 10th	Night	22% 14% 4 8% 6% 5% 4 3 4 4 27%	3724
	11th to 20th	Night	17% 22% 7% 10% 5% 4 3 2 3 4 24%	3708
	21st to end	Night	16% 20% 5% 11% 5% 3 3 2 3 3 29%	3466
April	1st to 10th	Night	22% 14% 4 9% 5% 4 4 4 5% 5% 26%	1900
	11th to 20th	Night	24% 11% 4 7% 5% 3 3 3 4 5% 30%	1875
	21st to end	Night	23% 13% 4 6% 4 4 3 3 4 4 32%	1717
May	1st to 10th	Night	26% 11% 3 8% 4 4 5% 3 5% 5% 26%	2741
	11th to 20th	Night	22% 9% 3 8% 5% 4 3 3 4 6% 33%	2495
	21st to end	Night	17% 7% 3 7% 5% 4 5% 4 6% 8% 35%	2738
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	26% 15% 2 7% 5% 3 4 3 5% 5% 24%	2717
November	1st to 10th	Night	22% 13% 4 8% 4 4 4 3 4 5% 28%	2431
	11th to 20th	Night	19% 17% 5% 10% 4 3 3 3 4 5% 26%	2470
	21st to end	Night	21% 18% 6% 11% 5% 3 3 3 4 4 21%	2655
December	1st to 10th	Night	22% 25% 6% 11% 6% 4 4 3 4 3 13%	2660
	11th to 20th	Night	22% 20% 7% 12% 5% 5% 4 2 3 3 16%	3288
	21st to end	Night	24% 20% 7% 13% 5% 4 3 2 3 3 16%	4884

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	73% 7% 10% 9% 1	2518
	11th to 20th	Day	72% 9% 8% 7% 3	2520
	21st to end	Day	73% 6% 10% 7% 3 1	2772
February	1st to 10th	Day	72% 4 8% 11% 4 1	1638
	11th to 20th	Day	70% 5% 9% 11% 4	1828
	21st to end	Day	66% 5% 8% 12% 7% 1	1570
March	1st to 10th	Day	65% 8% 9% 10% 7% 1	3119
	11th to 20th	Day	65% 7% 10% 10% 8% 1	3247
	21st to end	Day	57% 5% 7% 16% 15% 1	4166
April	1st to 10th	Day	61% 5% 8% 17% 8% 1	2280
	11th to 20th	Day	54% 6% 7% 19% 12% 1	2254
	21st to end	Day	58% 7% 10% 15% 8% 2	2461
May	1st to 10th	Day	57% 9% 8% 18% 7% 1	4242
	11th to 20th	Day	52% 12% 14% 15% 7% 1	4402
	21st to end	Day	42% 11% 13% 23% 10% 1	4837
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	56% 6% 11% 17% 8%	2024
	11th to 20th	Day	55% 8% 15% 15% 7%	1828
	21st to end	Day	67% 5% 8% 13% 6% 1	1881
November	1st to 10th	Day	59% 6% 11% 16% 7%	1681
	11th to 20th	Day	65% 7% 9% 11% 7% 2	1710
	21st to end	Day	67% 6% 13% 10% 3	1523
December	1st to 10th	Day	75% 5% 9% 8% 3	1520
	11th to 20th	Day	68% 5% 8% 13% 5%	1906
	21st to end	Day	74% 7% 7% 9% 3	2772
January	1st to 10th	Night	74% 8% 12% 5% 1	4429
	11th to 20th	Night	73% 9% 8% 7% 2	4440
	21st to end	Night	73% 6% 9% 7% 4 1	4884
February	1st to 10th	Night	72% 5% 8% 10% 5%	2537
	11th to 20th	Night	69% 6% 7% 12% 6%	2249
	21st to end	Night	64% 6% 8% 13% 8% 1	1884
March	1st to 10th	Night	60% 7% 9% 15% 7% 1	3734
	11th to 20th	Night	62% 8% 7% 14% 8% 1	3709
	21st to end	Night	60% 5% 6% 15% 12% 1	3466
April	1st to 10th	Night	60% 6% 9% 14% 9% 1	1900
	11th to 20th	Night	56% 6% 9% 18% 11%	1875
	21st to end	Night	55% 6% 8% 15% 13% 2	1717
May	1st to 10th	Night	57% 9% 9% 16% 8% 1	2747
	11th to 20th	Night	51% 9% 14% 17% 9% 1	2496
	21st to end	Night	43% 10% 14% 18% 14% 1	2739
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	51% 8% 11% 21% 9%	2154
	11th to 20th	Night	56% 8% 11% 18% 7%	2351
	21st to end	Night	62% 7% 11% 12% 7% 1	2717
November	1st to 10th	Night	58% 7% 11% 16% 7% 1	2431
	11th to 20th	Night	61% 7% 9% 14% 7% 2	2470
	21st to end	Night	68% 6% 10% 12% 3	2655
December	1st to 10th	Night	77% 6% 7% 8% 2	2660
	11th to 20th	Night	75% 6% 7% 8% 4	3288
	21st to end	Night	75% 6% 6% 10% 3	4884

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	31% 24% 27% 14% 4 1	180
	11th to 20th	Day	31% 24% 32% 8% 3 1	180
	21st to end	Day	23% 23% 37% 13% 5%	198
February	1st to 10th	Day	39% 30% 24% 6%	236
	11th to 20th	Day	30% 28% 31% 8% 3	427
	21st to end	Day	31% 21% 32% 15% 2	382
March	1st to 10th	Day	32% 20% 29% 15% 3	460
	11th to 20th	Day	31% 25% 26% 13% 4	460
	21st to end	Day	36% 22% 23% 13% 6% 1	506
April	1st to 10th	Day	37% 18% 26% 14% 5% 1	460
	11th to 20th	Day	36% 21% 22% 13% 6% 2	452
	21st to end	Day	31% 20% 29% 13% 6% 2	460
May	1st to 10th	Day	35% 18% 25% 14% 7% 2	463
	11th to 20th	Day	25% 16% 32% 16% 8% 2	487
	21st to end	Day	20% 20% 33% 20% 6% 1	529
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% 17% 25% 15% 5%	429
November	1st to 10th	Day	33% 17% 26% 17% 6% 1	369
	11th to 20th	Day	35% 22% 22% 15% 6% 1	370
	21st to end	Day	32% 23% 29% 14% 1	183
December	1st to 10th	Day	31% 24% 26% 16% 3	180
	11th to 20th	Day	33% 24% 33% 7% 2	180
	21st to end	Day	32% 28% 27% 11% 3	198
January	1st to 10th	Night	28% 23% 30% 17% 3	760
	11th to 20th	Night	28% 23% 29% 16% 4	760
	21st to end	Night	21% 20% 32% 22% 4 1	836
February	1st to 10th	Night	24% 21% 32% 19% 3	760
	11th to 20th	Night	24% 22% 33% 19% 2	743
	21st to end	Night	25% 21% 30% 22% 3	628
March	1st to 10th	Night	30% 17% 28% 22% 3	760
	11th to 20th	Night	30% 20% 26% 19% 6%	760
	21st to end	Night	29% 19% 25% 20% 7% 1	836
April	1st to 10th	Night	31% 15% 27% 23% 4	760
	11th to 20th	Night	33% 16% 23% 21% 7%	751
	21st to end	Night	31% 15% 29% 19% 6%	577
May	1st to 10th	Night	29% 11% 28% 22% 9% 1	516
	11th to 20th	Night	22% 11% 33% 26% 8% 1	374
	21st to end	Night	18% 10% 29% 32% 10%	411
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	748
	11th to 20th	Night	29% 19% 25% 18% 8% 1	760
	21st to end	Night	34% 19% 25% 16% 5% 1	760
December	1st to 10th	Night	35% 20% 25% 16% 4	760
	11th to 20th	Night	30% 21% 27% 17% 5%	760
	21st to end	Night	32% 22% 25% 18% 3	836

Page generated at 2024-10-30 13:19:22. Version ac07

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