Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 27

Waxing Gibbous 88%

16:13

04:32

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

Sun - Rise: 06:12, Set: 19:57, Transit: 13:05. Moon - Rise: 16:13, Set: 04:32. Civil Dark: 20:26 - 05:43. Nautical Dark: 21:01 - 05:09. Astro Dark: 21:38 - 04:30

Total Clouds (% Sky Obscured)

35
36
36
3
9
27
29
35
39
55
72
68
58
39
15
65
92
30
9
62
78
100
100
84

Low Clouds (% Sky Obscured)

23
25
16
0
4
18
18
26
19
24
17
5
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
0
0
0
0
25
47
22
19

High Clouds (% Sky Obscured)

2
2
0
1
1
1
2
0
3
53
72
68
58
39
13
37
92
26
6
47
65
100
100
79

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)

2
2
2
2
2
2
2
3
4
5
5
5
6
6
6
5
4
5
6
7
6
4
4
3

Chance of Frost

Temperature (°C)

5
5
6
8
12
15
16
18
19
19
20
20
19
19
18
15
13
12
11
11
10
9
9
9

Feels Like (°C)

5
5
6
9
13
15
17
17
19
18
19
18
18
18
17
14
10
9
8
9
7
7
6
6

Dew Point (°C)

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

Relative Humidity (%)

89
90
88
77
67
60
53
47
43
40
39
39
40
47
54
56
57
56
67
67
63
66
65
67

Pressure (mb)

1023
1023
1024
1025
1025
1025
1025
1025
1024
1024
1023
1023
1023
1023
1023
1023
1024
1024
1024
1024
1024
1024
1024
1024

Ozone (du)

361
360
359
359
358
357
355
357
354
353
353
352
350
348
345
346
345
348
348
347
346
345
344
343

Tuesday 28

Waxing Gibbous 94%

17:16

04:53

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 06:11, Set: 19:58, Transit: 13:04. Moon - Rise: 17:16, Set: 04:53. Civil Dark: 20:27 - 05:42. Nautical Dark: 21:02 - 05:07. Astro Dark: 21:39 - 04:28

Total Clouds (% Sky Obscured)

100
100
63
73
88
100
100
100
100
100
100
100
100
100
100
84
75
83
84
64
77
96
80
80

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
3
88
91
100
100
100
100
100
54
41
35
37
47
20
10
14
27

Medium Clouds (% Sky Obscured)

20
11
1
11
20
57
100
94
99
100
100
100
100
55
58
26
10
30
30
32
21
36
32
27

High Clouds (% Sky Obscured)

100
100
63
59
74
100
100
100
100
100
45
2
0
0
0
0
0
9
52
28
77
85
52
40

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
3
6
3
7
5
11
22
26
9
1
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)

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

Chance of Frost

Temperature (°C)

8
7
8
9
12
14
15
15
16
15
15
15
15
15
15
14
13
12
11
10
10
9
9
9

Feels Like (°C)

5
5
5
7
9
10
12
11
12
12
13
13
13
13
13
12
11
10
9
8
9
8
8
7

Dew Point (°C)

3
2
2
3
3
4
4
5
6
4
6
6
8
11
11
10
9
7
7
7
8
7
6
6

Relative Humidity (%)

68
69
68
62
55
50
47
48
52
48
52
55
62
76
78
76
74
73
77
80
85
82
77
82

Pressure (mb)

1024
1023
1024
1024
1024
1023
1022
1022
1021
1021
1020
1020
1019
1019
1019
1019
1019
1020
1019
1019
1018
1017
1017
1017

Ozone (du)

342
341
340
340
337
335
332
330
331
330
333
333
332
335
340
343
338
339
335
334
335
336
338
338

Wednesday 29

Waxing Gibbous 98%

18:18

04:53

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 06:10, Set: 19:59, Transit: 13:04. Moon - Rise: 18:18, Set: 04:53. Civil Dark: 20:28 - 05:41. Nautical Dark: 21:03 - 05:06. Astro Dark: 21:41 - 04:26

Total Clouds (% Sky Obscured)

100
100
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
97
88
54
56
59
77

Low Clouds (% Sky Obscured)

15
45
42
23
42
81
80
100
100
98
97
100
100
93
100
100
100
91
93
81
54
55
59
77

Medium Clouds (% Sky Obscured)

27
58
56
89
100
85
99
100
100
100
100
100
98
98
95
98
35
45
13
10
1
1
0
0

High Clouds (% Sky Obscured)

100
100
84
100
100
100
99
100
100
100
100
26
100
100
8
100
90
18
1
0
1
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
3
1
5
1
8
1
0
0
1
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
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
2
4
6
1
2
18
69
79
95
95
95
95
95
95
72
34
20
12
1
1
1
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.4
0.4
2.5
1.4
1.7
1.4
0.5
1.6
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
4
5
5
8
9
11
9
10
8
8
7
9
9
11
9
7
4
5
7
7
7
8
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
7
7
9
9
11
11
13
13
15
15
14
12
12
10
11
13
13
12
9
9
8
8
8

Dew Point (°C)

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

Relative Humidity (%)

84
87
87
80
72
65
67
72
70
83
85
96
96
96
96
98
98
100
98
93
93
93
93
93

Pressure (mb)

1016
1016
1016
1016
1015
1014
1013
1012
1011
1010
1009
1008
1007
1007
1006
1006
1006
1007
1007
1007
1007
1007
1007
1008

Ozone (du)

338
340
341
344
345
344
346
350
354
356
356
358
360
361
366
373
385
391
397
396
393
389
382
380

Thursday 30

Waxing Gibbous 100%

19:21

05:16

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
18 OK
19 Good
20 Good
21 Good
22 Good
23 Good
00 Good
01 OK
02 Bad
03 Bad
04 Bad

Sun - Rise: 06:08, Set: 20:00, Transit: 13:04. Moon - Rise: 19:21, Set: 05:16. Civil Dark: 20:29 - 05:39. Nautical Dark: 21:04 - 05:04. Astro Dark: 21:42 - 04:25

Total Clouds (% Sky Obscured)

85
85
84
70
55
45
44
55
62
65
79
79
69
28
13
9
3
0
9
17
28
51
66
85

Low Clouds (% Sky Obscured)

82
80
78
64
50
36
33
30
28
30
32
34
26
18
11
7
3
0
2
4
6
4
2
0

Medium Clouds (% Sky Obscured)

1
3
5
5
6
6
17
32
41
51
58
65
48
28
13
8
3
0
9
17
28
28
17
7

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
27
40

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 (%)

2
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)

10
10
11
12
13
13
13
13
13
13
13
13
13
12
10
9
8
7
6
5
5
4
4
4

Chance of Frost

Temperature (°C)

11
10
10
10
11
12
13
14
15
16
16
16
16
15
13
12
11
10
8
8
7
6
6
6

Feels Like (°C)

8
6
5
6
6
7
8
10
11
12
12
11
12
10
11
9
8
7
6
6
6
5
4
5

Dew Point (°C)

9
8
8
8
7
6
4
4
3
3
2
2
3
4
4
3
2
1
1
1
1
0
-0
-1

Relative Humidity (%)

90
84
90
85
78
65
55
49
46
43
40
39
43
48
53
54
52
54
58
62
65
65
65
65

Pressure (mb)

1008
1009
1010
1010
1011
1011
1011
1011
1011
1010
1011
1010
1011
1011
1012
1013
1014
1014
1015
1015
1015
1015
1016
1016

Ozone (du)

380
382
385
384
385
387
384
382
389
388
389
393
394
389
392
389
388
387
387
385
383
381
380
380

Friday 1

Full Moon 100%

20:24

05:41

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

Sun - Rise: 06:07, Set: 20:01, Transit: 13:04. Moon - Rise: 20:24, Set: 05:41. Civil Dark: 20:30 - 05:38. Nautical Dark: 21:06 - 05:03. Astro Dark: 21:44 - 04:23

Total Clouds (% Sky Obscured)

90
90
86
59
33
13
19
46
65
71
82
95
97
97
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
3
7
11
17
27
37
25
12
0
0
0
0
21
42
62
68
74
80

Medium Clouds (% Sky Obscured)

5
2
0
0
0
0
8
17
30
55
65
85
86
87
89
92
95
98
95
96
95
95
95
95

High Clouds (% Sky Obscured)

45
40
35
22
13
6
6
6
5
7
7
7
37
35
49
59
69
79
71
68
80
100
80
70

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
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
2
3
19
20
10
19
21
26
30
29
33
35
37
30
23
15

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)

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

Chance of Frost

Temperature (°C)

5
6
6
8
10
11
13
14
15
15
16
16
15
14
13
12
12
11
10
10
10
9
9
9

Feels Like (°C)

4
5
5
7
9
10
12
13
12
12
14
14
13
12
12
11
10
10
9
10
9
9
7
7

Dew Point (°C)

-1
-1
0
0
1
2
3
4
4
5
4
5
7
7
9
8
8
8
8
8
8
8
8
7

Relative Humidity (%)

65
65
65
57
54
52
52
50
49
51
46
48
59
61
72
76
79
81
84
87
90
93
90
88

Pressure (mb)

1017
1017
1017
1018
1018
1018
1017
1017
1016
1016
1015
1015
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1014
1014

Ozone (du)

378
380
376
377
375
372
369
368
366
361
358
357
358
355
351
349
347
346
344
343
342
341
340
340

Saturday 2

Waning Gibbous 98%

21:27

06:10

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 OK
04 Good

Sun - Rise: 06:06, Set: 20:02, Transit: 13:04. Moon - Rise: 21:27, Set: 06:10. Civil Dark: 20:31 - 05:37. Nautical Dark: 21:07 - 05:01. Astro Dark: 21:45 - 04:21

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
98
98
100
99
97
96
96
96
87
50
40
15

Low Clouds (% Sky Obscured)

87
93
100
98
97
95
97
98
100
95
90
86
87
98
99
94
90
85
74
63
52
50
40
15

Medium Clouds (% Sky Obscured)

77
73
84
90
95
99
100
100
100
99
96
96
98
98
100
96
93
76
45
31
13
9
5
0

High Clouds (% Sky Obscured)

55
55
55
40
35
35
30
15
15
5
5
5
10
5
0
0
0
0
0
0
0
0
0
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
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
Very Light Rain
Very Light Rain
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None

Precipitation Probability (%)

29
38
45
47
52
58
59
58
56
75
84
87
88
94
95
95
95
95
76
55
20
16
11
0

Precipitation Amount (mm)

0
0
0
0
0
0.3
0.2
0
0
0.5
0.6
0.5
0.6
0.7
1.1
1.1
1.1
1
0.4
0.2
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

8
8
8
8
9
9
9
10
11
12
12
13
14
13
12
10
10
9
8
7
6
4
4
3

Feels Like (°C)

7
7
6
6
6
6
6
6
6
7
9
9
9
9
10
10
8
8
7
7
7
6
1
1

Dew Point (°C)

6
6
6
6
6
6
6
6
5
5
4
4
3
4
4
4
3
2
0
0
-1
-1
-1
-2

Relative Humidity (%)

87
87
87
87
84
80
77
73
67
62
58
53
49
54
59
66
63
61
59
63
65
69
71
70

Pressure (mb)

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

Ozone (du)

339
340
342
343
344
345
346
349
352
355
359
363
368
371
374
377
376
374
372
371
369
368
366
364

Sunday 3

Waning Gibbous 94%

22:28

06:45

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

Sun - Rise: 06:05, Set: 20:03, Transit: 13:04. Moon - Rise: 22:28, Set: 06:45. Civil Dark: 20:32 - 05:36. Nautical Dark: 21:08 - 04:58. Astro Dark: 21:46 - 04:20

Total Clouds (% Sky Obscured)

5
5
4
5
6
7
9
11
16
24
38
47
41
36
29
19
9
0
1
2
3

Low Clouds (% Sky Obscured)

5
5
0
4
6
7
9
11
16
24
38
35
23
12
0
0
0
0
0
0
1

Medium Clouds (% Sky Obscured)

0
0
4
4
6
7
9
11
11
10
9
9
9
5
5
3
2
0
0
0
0

High Clouds (% Sky Obscured)

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

Fog (%)

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

Precipitation Probability (%)

0
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

Wind Speed/Direction (mph)

6
6
6
7
8
10
11
11
12
12
11
10
9
8
7
6
6
5
5
5
6

Chance of Frost

Temperature (°C)

2
3
4
6
7
9
11
12
13
14
15
15
16
14
13
12
11
10
9
9
8

Feels Like (°C)

1
1
1
1
4
5
6
6
6
6
12
11
11
11
11
12
9
9
9
9
9

Dew Point (°C)

-3
-2
-2
-2
-1
0
1
0
0
0
1
2
2
4
5
6
5
4
2
2
2

Relative Humidity (%)

72
67
63
59
55
53
49
45
41
38
39
40
40
48
57
68
66
65
62
64
67

Pressure (mb)

1014
1014
1015
1015
1015
1015
1015
1015
1014
1014
1013
1013
1013
1013
1013
1013
1014
1014
1015
1015
1015

Ozone (du)

362
365
367
370
372
375
377
376
375
374
374
373
373
372
371
371
370
369
369
372
375

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

Generated: 27/04/26 05:11:51. Forecast: 27/04/26 to 03/05/26. Timezone: UTC-4.00