Jasper-Pulaski Fish and Wildlife Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Jasper-Pulaski Fish and Wildlife Area 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	13% 9% 3 8% 5% 5% 5% 4 6% 7% 36%	148849
	Night	14% 10% 4 8% 5% 4 4 4 5% 6% 37%	142817
Transparency	Day	45% 5% 12% 22% 13% 2	152401
	Night	46% 5% 11% 22% 14% 2	147329
Seeing	Day	18% 10% 28% 24% 15% 6%	18361
	Night	19% 9% 29% 30% 12% 1	28104

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	14% 14% 7% 13% 5% 4 4 4 6% 7% 22%	4691
	11th to 20th	Day	9% 15% 7% 14% 7% 7% 6% 5% 4 3 23%	4710
	21st to end	Day	17% 16% 4 9% 6% 4 4 3 5% 6% 26%	5174
February	1st to 10th	Day	16% 14% 5% 12% 6% 4 4 4 4 5% 26%	2046
	11th to 20th	Day	15% 12% 5% 9% 5% 5% 4 3 5% 7% 31%	2048
	21st to end	Day	16% 13% 5% 10% 4 4 4 3 6% 6% 29%	1730
March	1st to 10th	Day	19% 14% 5% 8% 4 3 3 2 3 4 34%	4580
	11th to 20th	Day	10% 9% 4 7% 5% 4 5% 4 5% 7% 41%	4808
	21st to end	Day	17% 13% 6% 10% 6% 6% 5% 4 5% 6% 22%	5995
April	1st to 10th	Day	18% 12% 3 8% 4 4 4 3 6% 6% 31%	2520
	11th to 20th	Day	17% 9% 3 6% 5% 4 5% 4 5% 6% 36%	2494
	21st to end	Day	19% 9% 3 7% 5% 4 4 4 5% 7% 34%	2683
May	1st to 10th	Day	18% 8% 3 7% 4 5% 5% 4 6% 8% 32%	7616
	11th to 20th	Day	13% 7% 3 7% 5% 5% 5% 4 6% 8% 37%	7626
	21st to end	Day	13% 7% 3 6% 5% 4 4 4 6% 9% 39%	9047
June	1st to 10th	Day	11% 5% 3 6% 4 5% 4 4 7% 8% 42%	2940
	11th to 20th	Day	10% 5% 2 5% 4 5% 5% 4 6% 8% 45%	2940
	21st to end	Day	10% 6% 2 7% 6% 5% 5% 5% 6% 9% 39%	2940
July	1st to 10th	Day	9% 6% 2 7% 5% 6% 6% 5% 8% 10% 37%	8280
	11th to 20th	Day	7% 5% 2 6% 4 5% 5% 5% 6% 10% 44%	8280
	21st to end	Day	10% 6% 3 7% 5% 5% 5% 4 6% 9% 39%	8990
August	1st to 10th	Day	12% 6% 2 6% 4 5% 5% 4 6% 7% 43%	6107
	11th to 20th	Day	13% 7% 3 7% 5% 5% 5% 4 6% 8% 37%	5651
	21st to end	Day	5% 4 2 5% 4 4 5% 4 6% 11% 50%	6080
September	1st to 10th	Day	9% 5% 2 6% 4 4 5% 4 5% 8% 49%	2520
	11th to 20th	Day	11% 5% 2 5% 4 5% 4 4 6% 8% 47%	2326
	21st to end	Day	11% 7% 3 6% 5% 4 5% 4 6% 8% 42%	2288
October	1st to 10th	Day	12% 6% 2 6% 4 3 4 4 6% 7% 47%	2200
	11th to 20th	Day	18% 7% 2 6% 4 5% 5% 3 5% 7% 39%	1980
	21st to end	Day	20% 8% 3 8% 5% 4 5% 3 6% 6% 32%	1980
November	1st to 10th	Day	12% 8% 2 6% 4 4 4 3 6% 6% 46%	1852
	11th to 20th	Day	19% 11% 3 7% 5% 4 3 3 5% 6% 35%	1890
	21st to end	Day	18% 13% 3 8% 5% 4 3 3 4 5% 34%	1890
December	1st to 10th	Day	11% 11% 3 9% 5% 4 4 3 4 7% 39%	2789
	11th to 20th	Day	14% 15% 6% 12% 6% 5% 4 3 5% 6% 22%	3088
	21st to end	Day	27% 20% 7% 12% 5% 4 4 3 4 4 11%	4070
January	1st to 10th	Night	13% 15% 8% 13% 6% 5% 4 4 5% 5% 23%	8232
	11th to 20th	Night	11% 16% 7% 15% 7% 5% 5% 4 5% 5% 21%	8280
	21st to end	Night	18% 14% 5% 9% 5% 4 5% 3 4 5% 29%	9022
February	1st to 10th	Night	17% 13% 5% 9% 6% 5% 4 3 4 5% 29%	2572
	11th to 20th	Night	15% 11% 4 8% 5% 5% 4 3 5% 6% 36%	2458
	21st to end	Night	18% 13% 3 9% 4 4 3 3 4 5% 32%	2076
March	1st to 10th	Night	16% 12% 4 7% 4 4 4 3 4 5% 38%	5493
	11th to 20th	Night	13% 8% 2 6% 4 4 4 4 5% 7% 43%	5358
	21st to end	Night	18% 9% 3 8% 5% 4 5% 4 5% 6% 31%	5218
April	1st to 10th	Night	14% 9% 3 7% 5% 4 5% 3 5% 7% 37%	2100
	11th to 20th	Night	18% 9% 2 6% 4 4 4 3 4 7% 38%	2075
	21st to end	Night	17% 8% 3 6% 5% 4 4 4 6% 6% 37%	1937
May	1st to 10th	Night	18% 10% 3 7% 5% 4 4 3 5% 6% 35%	5237
	11th to 20th	Night	14% 6% 2 5% 3 4 4 4 6% 9% 43%	5217
	21st to end	Night	14% 8% 3 7% 4 4 5% 4 5% 8% 38%	5139
June	1st to 10th	Night	11% 5% 2 5% 4 4 3 4 5% 8% 49%	1680
	11th to 20th	Night	9% 5% 2 6% 4 4 4 4 6% 8% 47%	1680
	21st to end	Night	11% 5% 2 6% 4 5% 5% 4 6% 9% 42%	1680
July	1st to 10th	Night	9% 6% 2 6% 5% 4 4 4 5% 9% 45%	4708
	11th to 20th	Night	6% 5% 2 6% 4 4 4 4 6% 9% 50%	4707
	21st to end	Night	8% 5% 2 7% 5% 4 5% 5% 7% 8% 43%	5117
August	1st to 10th	Night	13% 5% 2 6% 4 4 4 4 6% 8% 45%	4043
	11th to 20th	Night	12% 6% 3 7% 4 5% 4 4 6% 8% 41%	4377
	21st to end	Night	7% 4 2 6% 4 4 5% 4 5% 8% 52%	5046
September	1st to 10th	Night	10% 4 2 6% 4 4 3 3 5% 7% 53%	2100
	11th to 20th	Night	8% 4 1 4 3 4 4 3 5% 8% 55%	2273
	21st to end	Night	11% 6% 2 6% 4 3 4 4 5% 8% 46%	2289
October	1st to 10th	Night	12% 5% 2 5% 3 4 4 3 5% 6% 53%	2200
	11th to 20th	Night	17% 7% 2 6% 3 3 4 3 5% 6% 45%	2415
	21st to end	Night	19% 9% 2 7% 4 4 3 4 5% 5% 39%	2860
November	1st to 10th	Night	13% 8% 2 6% 4 4 3 3 5% 6% 44%	2666
	11th to 20th	Night	14% 10% 3 7% 4 4 4 4 6% 6% 37%	2730
	21st to end	Night	18% 11% 4 8% 5% 4 4 3 4 5% 33%	2730
December	1st to 10th	Night	13% 9% 3 8% 4 3 4 3 5% 6% 42%	4613
	11th to 20th	Night	17% 14% 5% 10% 6% 4 5% 4 4 5% 27%	5339
	21st to end	Night	25% 18% 6% 11% 5% 4 4 3 4 5% 14%	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	61% 5% 14% 15% 5%	4692
	11th to 20th	Day	65% 3 8% 11% 10% 3	4710
	21st to end	Day	61% 3 13% 16% 7%	5174
February	1st to 10th	Day	60% 5% 11% 16% 6% 1	2046
	11th to 20th	Day	53% 5% 10% 23% 9% 1	2058
	21st to end	Day	54% 6% 13% 18% 7% 2	1730
March	1st to 10th	Day	55% 4 8% 22% 10% 2	4580
	11th to 20th	Day	41% 5% 11% 33% 9% 1	4808
	21st to end	Day	61% 6% 14% 14% 5% 1	5997
April	1st to 10th	Day	52% 6% 11% 19% 12%	2520
	11th to 20th	Day	48% 6% 11% 23% 10% 3	2494
	21st to end	Day	49% 6% 12% 20% 11% 2	2683
May	1st to 10th	Day	48% 6% 12% 21% 12%	7651
	11th to 20th	Day	45% 6% 12% 20% 16% 1	7630
	21st to end	Day	41% 6% 11% 22% 16% 4	9061
June	1st to 10th	Day	37% 6% 13% 23% 17% 3	2940
	11th to 20th	Day	35% 8% 11% 23% 20% 3	2940
	21st to end	Day	39% 8% 15% 19% 15% 3	2940
July	1st to 10th	Day	39% 7% 14% 24% 15% 2	8211
	11th to 20th	Day	33% 6% 14% 31% 15% 1	8205
	21st to end	Day	41% 6% 12% 24% 16% 2	8794
August	1st to 10th	Day	39% 6% 14% 23% 18% 1	6092
	11th to 20th	Day	43% 7% 13% 24% 13% 1	5690
	21st to end	Day	28% 6% 14% 32% 18% 3	6079
September	1st to 10th	Day	32% 7% 13% 26% 18% 4	2520
	11th to 20th	Day	34% 5% 12% 25% 20% 3	2326
	21st to end	Day	38% 5% 11% 23% 21% 2	2288
October	1st to 10th	Day	25% 4 10% 32% 27% 2	3590
	11th to 20th	Day	36% 4 11% 23% 26%	3196
	21st to end	Day	43% 4 10% 28% 13% 2	3180
November	1st to 10th	Day	38% 5% 14% 26% 14% 2	1852
	11th to 20th	Day	51% 4 11% 21% 12% 1	1890
	21st to end	Day	53% 4 12% 22% 8% 1	1890
December	1st to 10th	Day	46% 3 16% 25% 9%	2789
	11th to 20th	Day	61% 5% 13% 16% 4	3085
	21st to end	Day	78% 4 8% 8% 3	4070
January	1st to 10th	Night	62% 5% 11% 16% 7%	8233
	11th to 20th	Night	65% 4 10% 10% 10% 1	8280
	21st to end	Night	58% 4 11% 19% 8% 1	9022
February	1st to 10th	Night	57% 5% 11% 17% 8% 2	2572
	11th to 20th	Night	51% 4 11% 21% 11% 1	2459
	21st to end	Night	54% 5% 12% 17% 10% 2	2076
March	1st to 10th	Night	49% 4 9% 25% 10% 2	5493
	11th to 20th	Night	40% 5% 13% 26% 15% 2	5358
	21st to end	Night	52% 6% 11% 22% 8% 1	5218
April	1st to 10th	Night	45% 6% 13% 21% 13% 2	2100
	11th to 20th	Night	46% 5% 9% 21% 15% 3	2075
	21st to end	Night	46% 6% 10% 23% 12% 3	1937
May	1st to 10th	Night	50% 5% 8% 20% 14% 2	5264
	11th to 20th	Night	37% 7% 13% 23% 18% 1	5218
	21st to end	Night	42% 6% 10% 17% 20% 5%	5149
June	1st to 10th	Night	33% 5% 12% 25% 21% 2	1680
	11th to 20th	Night	34% 6% 12% 24% 21% 4	1680
	21st to end	Night	37% 7% 16% 20% 16% 3	1680
July	1st to 10th	Night	36% 5% 11% 29% 16% 3	4670
	11th to 20th	Night	31% 6% 13% 25% 24% 1	4662
	21st to end	Night	35% 7% 14% 23% 18% 4	5002
August	1st to 10th	Night	36% 5% 14% 25% 18% 1	4034
	11th to 20th	Night	40% 7% 14% 24% 14% 1	4404
	21st to end	Night	30% 6% 11% 33% 19% 2	5046
September	1st to 10th	Night	30% 6% 13% 26% 20% 5%	2100
	11th to 20th	Night	27% 5% 9% 28% 27% 4	2273
	21st to end	Night	36% 6% 10% 25% 20% 3	2289
October	1st to 10th	Night	22% 4 8% 34% 32% 1	3590
	11th to 20th	Night	36% 3 8% 24% 28% 2	3925
	21st to end	Night	38% 4 9% 26% 21% 2	4610
November	1st to 10th	Night	40% 5% 10% 25% 17% 3	2666
	11th to 20th	Night	45% 5% 12% 22% 13% 2	2730
	21st to end	Night	54% 4 10% 23% 9%	2730
December	1st to 10th	Night	44% 3 14% 27% 10% 2	4613
	11th to 20th	Night	60% 5% 13% 14% 8% 1	5341
	21st to end	Night	73% 4 9% 10% 4	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	23% 15% 34% 21% 5% 1	330
	11th to 20th	Day	24% 22% 33% 16% 4 2	330
	21st to end	Day	25% 20% 31% 19% 5%	363
February	1st to 10th	Day	22% 18% 35% 20% 5%	330
	11th to 20th	Day	24% 16% 38% 18% 4 1	330
	21st to end	Day	25% 18% 40% 13% 4	273
March	1st to 10th	Day	23% 19% 38% 18% 2	330
	11th to 20th	Day	24% 17% 34% 18% 7%	414
	21st to end	Day	28% 16% 32% 18% 6% 1	594
April	1st to 10th	Day	26% 14% 30% 21% 7% 2	540
	11th to 20th	Day	21% 16% 33% 17% 10% 3	532
	21st to end	Day	24% 13% 30% 22% 9% 2	540
May	1st to 10th	Day	22% 11% 30% 24% 9% 3	543
	11th to 20th	Day	20% 10% 30% 21% 15% 5%	567
	21st to end	Day	15% 6% 30% 25% 17% 7%	844
June	1st to 10th	Day	13% 7% 29% 27% 18% 6%	780
	11th to 20th	Day	13% 8% 27% 31% 17% 5%	780
	21st to end	Day	13% 6% 29% 30% 15% 6%	780
July	1st to 10th	Day	11% 2 18% 29% 22% 17%	771
	11th to 20th	Day	10% 2 23% 30% 23% 12%	768
	21st to end	Day	11% 4 20% 33% 23% 10%	849
August	1st to 10th	Day	10% 2 17% 29% 30% 12%	608
	11th to 20th	Day	13% 3 21% 28% 24% 12%	559
	21st to end	Day	9% 2 18% 32% 28% 11%	627
September	1st to 10th	Day	10% 5% 20% 30% 26% 9%	570
	11th to 20th	Day	11% 3 16% 26% 28% 16%	570
	21st to end	Day	15% 9% 19% 25% 23% 9%	562
October	1st to 10th	Day	14% 4 27% 29% 20% 6%	530
	11th to 20th	Day	19% 17% 26% 26% 11% 1	371
	21st to end	Day	30% 11% 36% 17% 5% 1	363
November	1st to 10th	Day	15% 14% 36% 22% 11% 4	330
	11th to 20th	Day	25% 15% 32% 19% 8% 2	330
	21st to end	Day	28% 13% 38% 16% 5%	330
December	1st to 10th	Day	18% 17% 38% 21% 6%	330
	11th to 20th	Day	23% 17% 36% 18% 5%	330
	21st to end	Day	30% 15% 36% 15% 3	363
January	1st to 10th	Night	22% 15% 36% 22% 5%	1050
	11th to 20th	Night	24% 16% 35% 21% 4	1050
	21st to end	Night	23% 14% 36% 24% 4	1155
February	1st to 10th	Night	24% 11% 38% 23% 4	892
	11th to 20th	Night	21% 14% 35% 26% 4	823
	21st to end	Night	24% 14% 39% 21% 3	692
March	1st to 10th	Night	20% 14% 37% 23% 5%	840
	11th to 20th	Night	20% 11% 39% 25% 6%	840
	21st to end	Night	23% 11% 35% 25% 6%	761
April	1st to 10th	Night	19% 13% 38% 24% 6%	630
	11th to 20th	Night	22% 10% 33% 27% 7% 1	623
	21st to end	Night	20% 10% 34% 28% 8%	630
May	1st to 10th	Night	21% 7% 34% 30% 8%	630
	11th to 20th	Night	19% 6% 28% 32% 14% 1	621
	21st to end	Night	13% 3 25% 40% 18% 1	683
June	1st to 10th	Night	12% 3 24% 45% 16%	630
	11th to 20th	Night	12% 3 28% 40% 17% 1	630
	21st to end	Night	12% 3 23% 41% 21% 1	630
July	1st to 10th	Night	10% 1 14% 42% 27% 6%	615
	11th to 20th	Night	9% 2 16% 40% 29% 4	612
	21st to end	Night	7% 2 13% 46% 30% 1	690
August	1st to 10th	Night	8% 1 10% 46% 31% 4	627
	11th to 20th	Night	10% 1 13% 42% 31% 3	624
	21st to end	Night	9% 1 14% 40% 33% 3	693
September	1st to 10th	Night	12% 2 15% 41% 26% 4	630
	11th to 20th	Night	11% 3 16% 38% 30% 3	803
	21st to end	Night	14% 5% 22% 31% 25% 3	833
October	1st to 10th	Night	14% 5% 23% 38% 19% 2	800
	11th to 20th	Night	20% 12% 28% 30% 9%	800
	21st to end	Night	23% 13% 31% 26% 7%	880
November	1st to 10th	Night	18% 11% 35% 26% 9% 1	820
	11th to 20th	Night	20% 15% 33% 25% 6%	840
	21st to end	Night	25% 14% 30% 25% 6%	840
December	1st to 10th	Night	24% 13% 35% 23% 4	982
	11th to 20th	Night	25% 11% 32% 26% 5%	1050
	21st to end	Night	33% 11% 29% 22% 4	1155

Page generated at 2026-09-26 03:18:41. Version ac07

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