Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 21

Waxing Crescent 23%

10:25

01:20

18 Bad
19 OK
20 OK
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:19, Set: 19:51, Transit: 13:05. Moon - Rise: 10:25, Set: 01:20. Civil Dark: 20:19 - 05:50. Nautical Dark: 20:53 - 05:16. Astro Dark: 21:29 - 04:40

Total Clouds (% Sky Obscured)

52
43
42
93
100
96
89
100
100
97
100
100
100
100
100
100
100
100
91
91
54
63
42
61

Low Clouds (% Sky Obscured)

3
3
14
0
0
0
24
61
0
0
0
0
3
4
60
60
90
97
89
85
47
62
29
61

Medium Clouds (% Sky Obscured)

20
14
42
93
100
96
79
96
94
97
92
100
100
100
100
100
97
28
19
24
30
4
11
5

High Clouds (% Sky Obscured)

0
0
13
50
86
77
57
68
100
86
100
100
100
100
100
100
100
40
45
37
1
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
1
10
34
51
73
47
10
2
3
14
19
15

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
8
5
7
9
9
8
8
9
8
8
7
7
7
7
6
6
6
6
6
6
10
9
10

Chance of Frost

Temperature (°C)

15
14
11
11
9
9
8
8
7
8
8
8
8
8
9
10
11
11
12
14
17
19
21
22

Feels Like (°C)

14
13
9
7
5
4
3
4
3
3
3
4
4
5
6
7
8
9
10
12
16
18
19
20

Dew Point (°C)

2
2
-1
1
-1
-1
-1
-1
-2
-3
-2
-1
-1
1
3
5
7
7
5
8
13
12
15
15

Relative Humidity (%)

39
45
44
50
49
50
52
54
51
49
50
52
55
59
66
72
75
75
64
67
74
64
66
65

Pressure (mb)

1023
1022
1023
1023
1023
1022
1022
1021
1020
1019
1019
1018
1018
1017
1017
1017
1017
1017
1017
1016
1016
1015
1014
1014

Ozone (du)

374
372
369
365
367
366
365
364
369
366
364
361
363
364
363
365
363
361
361
360
363
365
368
367

Wednesday 22

Waxing Crescent 37%

11:38

02:10

18 OK
19 Good
20 Good
21 OK
22 OK
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 Good
09 OK
10 Good
11 OK
12 Bad
13 OK
14 Bad
15 OK
16 OK
17 Good

Sun - Rise: 06:17, Set: 19:52, Transit: 13:05. Moon - Rise: 11:38, Set: 02:10. Civil Dark: 20:21 - 05:49. Nautical Dark: 20:55 - 05:15. Astro Dark: 21:31 - 04:38

Total Clouds (% Sky Obscured)

24
15
12
19
8
3
0
0
0
0
2
3
3
3
4
42
11
38
55
30
49
45
40
4

Low Clouds (% Sky Obscured)

5
0
0
2
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
0

Medium Clouds (% Sky Obscured)

7
6
3
6
3
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
2
2
2
3
37
8
23
35
11
36
44
30
2

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

6
2
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
5
4
4
4
4
5
6
6
5
5
4
4
4
4
5
7
8
8
9
9
9
9
8

Chance of Frost

Temperature (°C)

22
22
19
17
16
14
15
15
13
13
12
12
11
11
13
17
19
20
21
22
24
24
24
24

Feels Like (°C)

21
22
20
18
15
14
14
15
12
13
12
12
11
11
13
17
17
18
19
19
22
22
22
22

Dew Point (°C)

16
17
17
15
14
13
13
14
12
12
11
10
9
9
10
11
8
9
10
11
12
12
12
12

Relative Humidity (%)

68
74
86
88
90
90
90
92
92
93
92
90
90
88
79
66
50
49
50
48
46
47
47
47

Pressure (mb)

1014
1014
1015
1015
1016
1016
1015
1015
1015
1015
1015
1015
1016
1017
1017
1017
1017
1017
1016
1015
1015
1014
1013
1012

Ozone (du)

366
363
361
360
362
361
359
357
358
359
359
358
359
360
360
359
359
360
360
359
358
357
355
352

Thursday 23

First Quarter 49%

12:51

02:49

18 Good
19 Good
20 Good
21 Bad
22 Bad
23 Good
00 Good
01 OK
02 Bad
03 OK
04 OK
05 OK
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:16, Set: 19:53, Transit: 13:05. Moon - Rise: 12:51, Set: 02:49. Civil Dark: 20:22 - 05:48. Nautical Dark: 20:56 - 05:13. Astro Dark: 21:32 - 04:37

Total Clouds (% Sky Obscured)

2
1
4
74
50
13
2
36
64
37
39
29
65
98
100
99
73
80
57
37
31
33
46
50

Low Clouds (% Sky Obscured)

0
0
1
10
0
2
0
0
0
18
19
13
12
17
25
26
33
42
33
26
22
21
27
27

Medium Clouds (% Sky Obscured)

0
0
0
0
0
3
0
0
33
31
31
6
16
21
22
15
18
18
6
7
11
12
17
43

High Clouds (% Sky Obscured)

2
1
4
61
50
13
2
29
38
7
3
15
36
98
100
96
15
12
5
2
0
1
1
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
5
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Light Rain
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
27
65
29
41
44
45

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.7
0
0
0
0

Wind Speed/Direction (mph)

6
5
4
3
3
2
3
4
3
4
3
3
3
2
2
4
3
3
3
4
5
4
4
2

Chance of Frost

Temperature (°C)

23
22
19
17
16
15
15
14
12
12
11
11
10
10
12
15
16
18
20
21
22
23
23
23

Feels Like (°C)

24
24
19
17
15
14
13
15
13
13
11
10
9
9
12
14
16
19
21
22
23
24
24
23

Dew Point (°C)

13
14
11
8
6
7
8
10
9
9
7
7
7
7
8
9
10
11
11
12
14
13
13
14

Relative Humidity (%)

52
62
62
57
54
58
64
74
80
84
78
76
82
80
72
68
66
62
58
57
60
53
53
58

Pressure (mb)

1012
1013
1013
1014
1014
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1012
1011
1011
1010
1009
1009

Ozone (du)

352
351
351
351
350
349
351
352
353
353
353
352
353
354
353
354
357
360
362
361
360
358
357
358

Friday 24

Waxing Gibbous 60%

14:01

03:21

18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:15, Set: 19:54, Transit: 13:05. Moon - Rise: 14:01, Set: 03:21. Civil Dark: 20:23 - 05:46. Nautical Dark: 20:57 - 05:12. Astro Dark: 21:34 - 04:35

Total Clouds (% Sky Obscured)

56
69
67
62
57
73
85
100
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

32
37
26
15
4
14
25
35
50
64
79
80
82
86
90
95
100
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

31
62
67
60
32
37
46
56
68
84
100
100
100
100
99
100
100
91
68
58
71
62
68
66

High Clouds (% Sky Obscured)

0
1
2
11
13
45
72
98
93
100
87
100
100
95
91
60
76
71
70
60
56
62
62
21

ISS Passover

Visibility (miles)

9
6
3
9
9
9
9
9
9
9
9
9
9
9
9
4
1
0
0
9
9
9
7
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
Very Light Rain
None
None
None
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None

Precipitation Probability (%)

53
66
53
21
7
18
20
16
49
68
84
95
95
95
95
95
95
95
95
75
55
44
28
18

Precipitation Amount (mm)

0
0.3
0
0
0
0
0
0
0
0.4
0.6
1
1.4
1.6
1.8
1.9
2
1.6
1
0
0
0
0
0

Wind Speed/Direction (mph)

3
5
4
6
5
5
5
5
6
5
6
6
8
8
8
8
8
7
8
8
8
9
10
10

Chance of Frost

Temperature (°C)

21
20
18
17
15
13
13
12
12
12
12
12
11
11
11
10
10
11
11
11
12
12
11
11

Feels Like (°C)

23
20
18
15
13
12
11
10
10
11
10
10
9
9
9
9
9
10
10
11
13
12
10
9

Dew Point (°C)

15
16
15
15
13
12
12
11
11
11
11
11
10
10
10
10
10
10
10
10
10
10
10
9

Relative Humidity (%)

66
78
82
87
90
93
93
92
92
93
92
92
92
91
93
95
95
98
96
93
84
86
88
91

Pressure (mb)

1009
1009
1010
1010
1010
1010
1010
1010
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1010

Ozone (du)

357
357
356
355
356
355
354
352
351
353
354
354
354
352
353
354
355
356
358
360
360
360
361
364

Saturday 25

Waxing Gibbous 71%

15:08

03:47

18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 OK
14 OK
15 OK
16 OK
17 OK

Sun - Rise: 06:13, Set: 19:55, Transit: 13:05. Moon - Rise: 15:08, Set: 03:47. Civil Dark: 20:24 - 05:45. Nautical Dark: 20:58 - 05:10. Astro Dark: 21:35 - 04:33

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
99
98
98
90
81
70
59
52
47
45
41
36
37

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
97
94
90
82
73
65
57
49
41
39
38
36
36

Medium Clouds (% Sky Obscured)

57
45
52
58
65
52
45
34
24
13
0
1
3
4
3
1
0
1
1
2
1
1
0
8

High Clouds (% Sky Obscured)

31
36
35
100
100
100
100
100
100
100
100
96
80
36
41
47
53
53
52
47
45
41
24
13

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

15
11
13
10
3
3
2
2
3
5
2
1
1
0
0
1
0
1
1
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
9
8
8
8
7
7
7
7
7
6
6
6
6
7
6
6
5
4
5
6
6
6
6

Chance of Frost

Temperature (°C)

11
10
10
9
9
9
9
9
9
8
8
8
8
8
9
10
11
12
14
16
18
19
19
20

Feels Like (°C)

8
8
7
7
7
7
7
7
7
6
6
7
7
7
7
7
8
8
8
8
9
19
18
18

Dew Point (°C)

9
9
9
8
8
8
7
7
7
7
7
7
7
6
6
7
7
8
8
8
8
8
8
8

Relative Humidity (%)

91
91
93
93
91
91
90
91
91
90
90
90
90
88
85
82
78
77
67
58
51
49
47
45

Pressure (mb)

1011
1011
1013
1014
1014
1015
1015
1016
1016
1016
1017
1017
1018
1018
1019
1019
1020
1020
1019
1019
1018
1018
1018
1018

Ozone (du)

362
361
359
359
360
362
362
362
362
364
366
368
371
372
372
372
372
372
372
371
371
370
370
369

Sunday 26

Waxing Gibbous 80%

16:13

04:10

18 OK
19 OK
20 Good
21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:12, Set: 19:56, Transit: 13:05. Moon - Rise: 16:13, Set: 04:10. Civil Dark: 20:25 - 05:43. Nautical Dark: 20:59 - 05:09. Astro Dark: 21:36 - 04:31

Total Clouds (% Sky Obscured)

33
20
14
7
1
2
2
2
2
1
1
3
3
0
0
0
0
2
4
14
60
79
97
99

Low Clouds (% Sky Obscured)

33
20
14
7
0
0
0
0
0
0
0
0
0
0
0
0
0
2
4
5
7
9
11
7

Medium Clouds (% Sky Obscured)

10
15
12
7
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
20
42
66
71

High Clouds (% Sky Obscured)

7
1
0
0
0
0
0
1
0
0
0
3
3
0
0
0
0
0
1
1
25
48
71
83

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

5
4
4
3
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
6
7
7
7
8

Chance of Frost

Temperature (°C)

18
17
15
14
13
12
11
10
9
9
8
8
9
9
10
12
14
16
17
18
19
20
20
20

Feels Like (°C)

18
19
19
15
15
14
15
14
14
8
8
7
8
7
7
9
9
10
11
12
12
19
18
18

Dew Point (°C)

8
8
9
9
8
7
7
5
4
3
4
3
4
4
5
4
4
4
5
6
7
7
8
9

Relative Humidity (%)

51
58
66
69
71
73
73
71
68
69
71
73
72
70
68
59
51
45
45
44
44
44
46
47

Pressure (mb)

1018
1018
1019
1019
1020
1020
1021
1021
1021
1021
1022
1022
1022
1023
1023
1023
1023
1023
1022
1021
1021
1020
1020
1019

Ozone (du)

367
365
363
363
363
363
361
360
358
355
352
350
350
349
349
348
347
346
345
343
342
341
340
340

Monday 27

Waxing Gibbous 88%

17:16

04:32

18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:11, Set: 19:57, Transit: 13:04. Moon - Rise: 17:16, Set: 04:32. Civil Dark: 20:26 - 05:42. Nautical Dark: 21:01 - 05:07. Astro Dark: 21:38 - 04:30

Total Clouds (% Sky Obscured)

100
100
100
100
100
97
93
90
89
91
96
98
99
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

4
0
1
2
4
3
3
2
2
1
0
18
35
53
64
75
87
91
95
99

Medium Clouds (% Sky Obscured)

76
77
61
47
41
51
53
53
52
51
53
62
65
76
84
91
99
99
99
100

High Clouds (% Sky Obscured)

92
100
100
100
100
97
93
90
89
91
96
98
99
100
100
100
100
92
87
75

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7
8
8

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
1
28
50
73
92
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.5
0.7
0.9
1.1
1.2
1.4

Wind Speed/Direction (mph)

7
6
6
7
8
9
9
9
8
9
9
9
10
10
11
10
10
10
9
9

Chance of Frost

Temperature (°C)

18
17
15
14
12
11
11
10
10
10
9
9
9
9
10
10
10
10
11
11

Feels Like (°C)

18
18
18
11
10
10
9
9
9
6
5
5
5
5
5
5
5
5
5
4

Dew Point (°C)

8
7
5
5
6
6
5
5
5
6
6
6
6
6
7
8
8
9
10
11

Relative Humidity (%)

49
51
53
57
63
68
69
71
72
76
78
81
82
82
84
87
90
93
93
95

Pressure (mb)

1019
1020
1020
1020
1020
1020
1020
1020
1020
1019
1019
1019
1019
1019
1019
1018
1018
1017
1017
1016

Ozone (du)

339
338
338
339
339
340
339
338
336
335
333
331
331
332
332
335
338
341
343
344

Forecast for Marriottsville, Howard, United States of America (39.35,-76.90)

Generated: 21/04/26 18:06:31. Forecast: 21/04/26 to 27/04/26. Timezone: UTC-4.00