Honeymoon Island State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Honeymoon Island State Park clear sky chart from 2005-11-06 to 2024-12-06.

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	7% 5% 2 6% 5% 5% 6% 5% 8% 11% 41%	101186
	Night	8% 6% 2 6% 5% 5% 5% 4 7% 10% 42%	98481
Transparency	Day	19% 51% 11% 11% 7% 2	105003
	Night	20% 50% 10% 11% 7% 2	102803
Seeing	Day	8% 4 14% 26% 30% 18%	15503
	Night	8% 4 16% 33% 29% 10%	25539

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	11% 10% 3 7% 4 5% 4 4 6% 8% 38%	2836
	11th to 20th	Day	20% 10% 3 6% 4 3 3 3 5% 8% 35%	2840
	21st to end	Day	11% 7% 2 6% 4 4 4 4 6% 9% 42%	3444
February	1st to 10th	Day	13% 5% 1 6% 3 3 3 4 6% 9% 46%	1900
	11th to 20th	Day	8% 4 2 4 3 4 3 3 6% 6% 55%	1848
	21st to end	Day	7% 5% 2 5% 3 3 3 4 5% 8% 55%	1589
March	1st to 10th	Day	5% 7% 3 8% 5% 5% 5% 4 7% 10% 40%	3435
	11th to 20th	Day	7% 3 1 4 4 4 3 4 8% 11% 51%	3480
	21st to end	Day	10% 4 2 4 3 3 4 4 6% 9% 52%	3815
April	1st to 10th	Day	6% 3 2 4 3 3 5% 3 6% 11% 53%	2090
	11th to 20th	Day	8% 4 2 6% 5% 4 4 4 7% 9% 48%	2066
	21st to end	Day	5% 3 1 4 4 3 4 4 7% 9% 56%	2297
May	1st to 10th	Day	3 2 1 2 2 3 3 3 6% 9% 65%	4082
	11th to 20th	Day	8% 4 2 5% 4 5% 5% 5% 8% 10% 43%	4081
	21st to end	Day	3 2 1 3 4 3 4 4 7% 11% 58%	4476
June	1st to 10th	Day	10% 6% 3 7% 5% 6% 7% 5% 8% 11% 32%	2470
	11th to 20th	Day	5% 4 2 6% 6% 7% 7% 6% 10% 13% 34%	2470
	21st to end	Day	7% 6% 2 6% 6% 7% 7% 7% 11% 13% 29%	2470
July	1st to 10th	Day	5% 4 2 7% 6% 7% 8% 8% 12% 15% 26%	4120
	11th to 20th	Day	3 4 2 8% 7% 9% 10% 9% 12% 15% 23%	4120
	21st to end	Day	4 4 2 8% 8% 7% 9% 8% 12% 15% 23%	4466
August	1st to 10th	Day	7% 5% 2 7% 5% 8% 8% 6% 9% 13% 29%	3990
	11th to 20th	Day	4 4 2 6% 4 6% 7% 6% 9% 13% 39%	3729
	21st to end	Day	6% 5% 3 8% 7% 7% 7% 8% 11% 14% 26%	3870
September	1st to 10th	Day	7% 6% 3 8% 7% 6% 8% 8% 12% 13% 23%	2090
	11th to 20th	Day	10% 5% 3 8% 6% 7% 6% 6% 9% 11% 28%	2090
	21st to end	Day	7% 6% 3 9% 5% 6% 7% 5% 8% 10% 34%	2090
October	1st to 10th	Day	9% 6% 2 7% 6% 5% 7% 4 7% 11% 36%	2090
	11th to 20th	Day	7% 4 1 5% 3 5% 5% 4 6% 9% 52%	1969
	21st to end	Day	6% 4 2 5% 4 4 4 3 6% 10% 50%	2090
November	1st to 10th	Day	8% 5% 1 5% 4 4 5% 4 5% 8% 51%	1957
	11th to 20th	Day	9% 5% 2 5% 5% 4 4 4 6% 7% 48%	1994
	21st to end	Day	8% 5% 1 6% 3 3 5% 5% 7% 9% 48%	1800
December	1st to 10th	Day	6% 6% 2 5% 4 4 4 4 6% 10% 49%	1755
	11th to 20th	Day	11% 6% 2 6% 4 4 4 4 6% 7% 47%	2153
	21st to end	Day	14% 8% 3 9% 5% 5% 5% 4 5% 7% 35%	3124
January	1st to 10th	Night	11% 8% 4 9% 5% 5% 4 4 5% 7% 37%	4109
	11th to 20th	Night	18% 11% 3 8% 5% 4 4 3 6% 8% 31%	4120
	21st to end	Night	11% 7% 2 7% 5% 5% 4 4 7% 9% 39%	4208
February	1st to 10th	Night	11% 8% 2 5% 4 3 4 4 5% 7% 47%	2280
	11th to 20th	Night	9% 6% 2 5% 4 4 4 3 5% 7% 51%	2218
	21st to end	Night	7% 6% 2 6% 4 4 3 3 5% 7% 52%	1863
March	1st to 10th	Night	12% 8% 3 8% 5% 5% 5% 4 6% 7% 37%	3418
	11th to 20th	Night	5% 3 1 4 3 5% 4 5% 9% 12% 48%	3480
	21st to end	Night	10% 5% 2 5% 3 3 3 3 6% 8% 52%	3817
April	1st to 10th	Night	6% 4 2 5% 3 3 4 4 7% 11% 51%	2090
	11th to 20th	Night	5% 4 2 6% 4 5% 5% 4 6% 9% 49%	2063
	21st to end	Night	6% 3 2 5% 4 3 4 3 5% 7% 58%	1892
May	1st to 10th	Night	3 2 1 3 3 3 3 4 6% 9% 63%	2813
	11th to 20th	Night	7% 5% 2 5% 5% 4 4 5% 6% 9% 47%	2812
	21st to end	Night	3 3 1 4 3 3 3 4 5% 7% 64%	3079
June	1st to 10th	Night	10% 6% 2 8% 4 5% 4 4 7% 10% 41%	1710
	11th to 20th	Night	5% 4 2 6% 5% 5% 6% 6% 11% 11% 40%	1710
	21st to end	Night	6% 5% 2 6% 6% 6% 6% 6% 9% 14% 35%	1710
July	1st to 10th	Night	5% 4 2 9% 6% 7% 9% 7% 10% 15% 26%	2840
	11th to 20th	Night	3 4 1 7% 7% 8% 9% 7% 11% 14% 29%	2840
	21st to end	Night	4 6% 3 10% 8% 9% 10% 7% 11% 14% 20%	3087
August	1st to 10th	Night	6% 4 2 7% 5% 6% 7% 6% 9% 12% 37%	2934
	11th to 20th	Night	3 3 2 5% 4 5% 6% 5% 10% 16% 41%	3100
	21st to end	Night	7% 6% 3 8% 7% 7% 7% 6% 9% 13% 28%	3751
September	1st to 10th	Night	5% 5% 3 10% 7% 7% 7% 7% 10% 12% 28%	2090
	11th to 20th	Night	9% 7% 3 9% 6% 6% 6% 4 9% 10% 30%	2090
	21st to end	Night	7% 7% 3 8% 5% 5% 6% 4 7% 10% 37%	2090
October	1st to 10th	Night	10% 6% 2 7% 4 5% 5% 4 8% 9% 39%	2090
	11th to 20th	Night	6% 4 1 4 5% 5% 5% 4 6% 7% 53%	2209
	21st to end	Night	7% 6% 3 6% 4 4 4 3 5% 8% 50%	2508
November	1st to 10th	Night	8% 4 2 4 5% 4 4 3 5% 8% 52%	2341
	11th to 20th	Night	9% 5% 2 7% 4 4 4 4 5% 8% 48%	2403
	21st to end	Night	8% 5% 2 6% 4 5% 4 4 7% 9% 46%	2600
December	1st to 10th	Night	8% 4 1 5% 5% 4 4 4 5% 9% 50%	2542
	11th to 20th	Night	12% 6% 2 6% 4 5% 4 3 6% 8% 46%	3042
	21st to end	Night	15% 7% 3 7% 5% 5% 5% 4 6% 8% 33%	4532

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	29% 40% 6% 11% 9% 5%	2837
	11th to 20th	Day	38% 37% 4 7% 9% 5%	2840
	21st to end	Day	22% 42% 6% 16% 12% 2	3444
February	1st to 10th	Day	11% 67% 5% 7% 7% 4	1900
	11th to 20th	Day	8% 64% 3 8% 13% 4	1858
	21st to end	Day	11% 65% 6% 6% 8% 4	1589
March	1st to 10th	Day	28% 47% 11% 9% 4 2	3435
	11th to 20th	Day	17% 43% 11% 16% 11% 3	3480
	21st to end	Day	19% 41% 4 22% 9% 5%	3815
April	1st to 10th	Day	8% 67% 7% 9% 6% 3	2090
	11th to 20th	Day	10% 67% 5% 6% 9% 3	2066
	21st to end	Day	8% 66% 5% 10% 10% 2	2297
May	1st to 10th	Day	8% 43% 12% 21% 12% 3	4120
	11th to 20th	Day	21% 44% 14% 13% 7% 1	4085
	21st to end	Day	7% 42% 11% 26% 14% 1	4489
June	1st to 10th	Day	14% 68% 9% 7% 2	2470
	11th to 20th	Day	14% 71% 8% 7%	2470
	21st to end	Day	10% 70% 12% 7% 1	2470
July	1st to 10th	Day	19% 49% 29% 4	4055
	11th to 20th	Day	26% 50% 23% 1	4051
	21st to end	Day	26% 52% 18% 4	4324
August	1st to 10th	Day	25% 44% 19% 9% 3	3977
	11th to 20th	Day	13% 44% 21% 19% 3	3765
	21st to end	Day	22% 47% 21% 10%	3870
September	1st to 10th	Day	16% 68% 9% 7% 1	2090
	11th to 20th	Day	15% 63% 13% 7% 2	2090
	21st to end	Day	16% 63% 8% 9% 3 1	2090
October	1st to 10th	Day	42% 44% 6% 5% 2	3480
	11th to 20th	Day	11% 38% 6% 13% 28% 4	3248
	21st to end	Day	15% 38% 5% 17% 20% 4	3428
November	1st to 10th	Day	14% 57% 6% 12% 7% 3	1957
	11th to 20th	Day	17% 59% 5% 9% 6% 4	1994
	21st to end	Day	14% 58% 4 11% 9% 4	1800
December	1st to 10th	Day	12% 59% 6% 13% 8% 1	1755
	11th to 20th	Day	18% 48% 5% 9% 10% 9%	2150
	21st to end	Day	36% 40% 7% 12% 4 1	3124
January	1st to 10th	Night	32% 39% 6% 9% 11% 3	4109
	11th to 20th	Night	40% 38% 5% 9% 7% 1	4120
	21st to end	Night	25% 42% 7% 10% 13% 3	4208
February	1st to 10th	Night	12% 66% 6% 8% 6% 2	2280
	11th to 20th	Night	11% 64% 3 7% 11% 4	2219
	21st to end	Night	12% 65% 5% 6% 9% 2	1863
March	1st to 10th	Night	36% 45% 8% 5% 4 2	3418
	11th to 20th	Night	14% 43% 20% 13% 8% 2	3480
	21st to end	Night	20% 42% 5% 17% 12% 4	3817
April	1st to 10th	Night	9% 66% 7% 10% 6% 2	2090
	11th to 20th	Night	10% 67% 5% 9% 8% 2	2063
	21st to end	Night	8% 65% 6% 10% 9% 2	1892
May	1st to 10th	Night	10% 44% 13% 21% 9% 3	2840
	11th to 20th	Night	19% 44% 14% 16% 7%	2813
	21st to end	Night	8% 41% 9% 29% 12% 1	3087
June	1st to 10th	Night	12% 67% 10% 9% 1	1710
	11th to 20th	Night	14% 70% 10% 6%	1710
	21st to end	Night	10% 68% 12% 8% 2	1710
July	1st to 10th	Night	26% 46% 24% 4	2795
	11th to 20th	Night	24% 49% 25% 2	2786
	21st to end	Night	36% 47% 15% 2	2988
August	1st to 10th	Night	23% 44% 19% 9% 5%	2923
	11th to 20th	Night	12% 45% 23% 19% 1	3130
	21st to end	Night	25% 47% 19% 7% 2	3751
September	1st to 10th	Night	18% 65% 10% 6% 1	2090
	11th to 20th	Night	14% 65% 11% 8% 2	2090
	21st to end	Night	16% 63% 9% 9% 3	2090
October	1st to 10th	Night	44% 42% 7% 5% 2	3480
	11th to 20th	Night	11% 38% 6% 18% 24% 3	3669
	21st to end	Night	17% 39% 6% 16% 20% 3	4120
November	1st to 10th	Night	13% 57% 8% 10% 8% 3	2341
	11th to 20th	Night	17% 59% 4 7% 9% 4	2403
	21st to end	Night	14% 58% 4 10% 8% 5%	2600
December	1st to 10th	Night	12% 59% 6% 14% 7% 1	2542
	11th to 20th	Night	18% 49% 4 10% 12% 7%	3044
	21st to end	Night	34% 41% 10% 9% 5% 1	4532

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	9% 8% 34% 33% 14% 1	270
	11th to 20th	Day	8% 11% 27% 36% 16% 3	270
	21st to end	Day	15% 10% 36% 31% 8%	297
February	1st to 10th	Day	10% 8% 24% 37% 19% 1	270
	11th to 20th	Day	8% 7% 27% 34% 20% 3	270
	21st to end	Day	5% 4 30% 37% 22% 2	244
March	1st to 10th	Day	4 7% 33% 42% 14% 1	460
	11th to 20th	Day	9% 6% 26% 34% 22% 3	460
	21st to end	Day	6% 5% 23% 39% 23% 3	506
April	1st to 10th	Day	7% 6% 26% 36% 22% 2	460
	11th to 20th	Day	7% 7% 23% 37% 23% 3	452
	21st to end	Day	5% 3 18% 33% 35% 6%	460
May	1st to 10th	Day	5% 2 13% 39% 32% 9%	463
	11th to 20th	Day	8% 2 11% 29% 36% 14%	487
	21st to end	Day	5% 1 7% 22% 43% 21%	529
June	1st to 10th	Day	10% 1 7% 21% 40% 20%	490
	11th to 20th	Day	5% 2 6% 19% 38% 29%	490
	21st to end	Day	4 1 3 14% 34% 44%	490
July	1st to 10th	Day	5% 1 3 11% 30% 51%	485
	11th to 20th	Day	4 1 3 8% 35% 49%	484
	21st to end	Day	9% 1 4 12% 35% 40%	532
August	1st to 10th	Day	7% 1 4 11% 35% 42%	486
	11th to 20th	Day	7% 1 4 9% 32% 48%	479
	21st to end	Day	9% 1 4 15% 35% 36%	539
September	1st to 10th	Day	7% 2 4 14% 37% 36%	490
	11th to 20th	Day	10% 2 4 19% 39% 25%	490
	21st to end	Day	7% 3 6% 18% 41% 25%	490
October	1st to 10th	Day	14% 2 12% 27% 36% 9%	490
	11th to 20th	Day	6% 4 14% 31% 35% 11%	490
	21st to end	Day	7% 4 15% 34% 34% 6%	539
November	1st to 10th	Day	8% 3 17% 33% 33% 6%	495
	11th to 20th	Day	11% 7% 17% 37% 24% 3	494
	21st to end	Day	7% 6% 24% 35% 25% 3	300
December	1st to 10th	Day	5% 7% 25% 35% 22% 5%	285
	11th to 20th	Day	13% 4 27% 33% 19% 3	270
	21st to end	Day	7% 7% 21% 36% 26% 3	297
January	1st to 10th	Night	11% 7% 28% 36% 17% 1	760
	11th to 20th	Night	11% 8% 22% 40% 19% 1	760
	21st to end	Night	13% 9% 30% 35% 13%	836
February	1st to 10th	Night	13% 6% 24% 40% 17%	760
	11th to 20th	Night	9% 7% 26% 38% 18% 1	743
	21st to end	Night	10% 4 25% 44% 18%	628
March	1st to 10th	Night	6% 6% 29% 46% 13% 1	760
	11th to 20th	Night	8% 5% 23% 38% 24% 1	760
	21st to end	Night	7% 3 27% 44% 19% 1	836
April	1st to 10th	Night	6% 5% 22% 45% 21% 1	760
	11th to 20th	Night	7% 4 23% 46% 19% 1	751
	21st to end	Night	7% 3 20% 43% 27%	685
May	1st to 10th	Night	5% 1 10% 45% 35% 5%	570
	11th to 20th	Night	7% 2 12% 39% 34% 6%	561
	21st to end	Night	5% 1 8% 33% 44% 9%	617
June	1st to 10th	Night	11% 2 6% 23% 46% 12%	570
	11th to 20th	Night	5% 1 5% 20% 42% 27%	570
	21st to end	Night	5% 1 4 13% 44% 33%	570
July	1st to 10th	Night	6% 1 2 7% 39% 45%	555
	11th to 20th	Night	4 1 1 10% 38% 46%	552
	21st to end	Night	4 1 3 10% 43% 39%	624
August	1st to 10th	Night	5% 1 3 8% 45% 38%	567
	11th to 20th	Night	5% 1 2 8% 40% 44%	564
	21st to end	Night	10% 1 5% 18% 40% 26%	785
September	1st to 10th	Night	7% 1 6% 18% 45% 23%	760
	11th to 20th	Night	10% 1 8% 25% 42% 15%	760
	21st to end	Night	9% 3 7% 26% 43% 12%	760
October	1st to 10th	Night	11% 3 16% 36% 29% 5%	760
	11th to 20th	Night	6% 3 14% 37% 36% 4	760
	21st to end	Night	9% 4 19% 39% 28% 2	836
November	1st to 10th	Night	9% 3 20% 42% 23% 3	780
	11th to 20th	Night	10% 4 21% 42% 21% 2	800
	21st to end	Night	7% 6% 23% 41% 21% 1	800
December	1st to 10th	Night	9% 3 23% 37% 26% 2	783
	11th to 20th	Night	10% 5% 23% 37% 23% 2	760
	21st to end	Night	10% 5% 23% 38% 22% 1	836

Page generated at 2024-12-03 06:45:11. Version ac07

Copyright © 2024 Attilla Danko.