Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 28

Waxing Crescent 38%

15:13

21:35

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

Sun - Rise: 07:33, Set: 19:20, Transit: 13:26. Moon - Rise: 15:13, Set: 21:35. Civil Dark: 19:53 - 07:00. Nautical Dark: 20:32 - 06:20. Astro Dark: 21:13 - 05:40

Total Clouds (% Sky Obscured)

80
85
88
84
83
69
38
35
1
1
23
1
26
29
46
45
49
59
33
20
23
51
64
58

Low Clouds (% Sky Obscured)

22
13
13
20
16
0
0
13
0
0
19
0
21
23
34
38
34
16
0
0
0
26
39
43

Medium Clouds (% Sky Obscured)

50
36
28
40
42
38
12
6
0
0
0
0
0
0
0
0
0
0
0
0
0
3
2
22

High Clouds (% Sky Obscured)

80
85
88
17
20
20
20
8
1
1
1
1
0
0
2
4
31
52
32
20
23
18
20
19

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
23
48
100
100
71
6
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
2
1
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)

3
3
3
3
3
3
2
2
2
2
3
3
4
4
4
4
4
3
3
3
3
4
4
4

Chance of Frost

Temperature (°C)

10
10
10
10
10
10
10
10
10
11
13
15
17
18
19
19
19
19
18
16
15
14
13
13

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
82
84
87
88
90
91
91
91
86
76
69
62
56
53
53
51
52
61
67
71
75
80
83

Pressure (mb)

1022
1023
1023
1023
1023
1023
1023
1022
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023

Ozone (du)

312
311
308
305
304
305
306
307
307
306
305
304
304
304
303
302
301
299
299
298
298
297
297
298

Monday 29

Waxing Crescent 48%

16:08

22:29

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
18 OK
19 OK
20 OK
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:35, Set: 19:17, Transit: 13:26. Moon - Rise: 16:08, Set: 22:29. Civil Dark: 19:51 - 07:01. Nautical Dark: 20:30 - 06:22. Astro Dark: 21:10 - 05:41

Total Clouds (% Sky Obscured)

77
79
91
88
87
73
66
65
64
62
70
76
92
71
71
74
84
59
29
20
34
55
70
75

Low Clouds (% Sky Obscured)

41
38
39
45
45
44
37
28
18
18
28
21
41
40
44
61
62
39
29
20
34
55
70
75

Medium Clouds (% Sky Obscured)

33
45
47
44
52
45
34
29
32
31
31
36
50
29
28
13
26
17
0
0
0
2
35
40

High Clouds (% Sky Obscured)

63
31
20
21
19
5
1
1
1
1
1
1
0
0
0
0
15
13
25
20
25
25
20
15

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
1
8
0
1
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
2
20
12
15
25
24
30
16
2
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
3
3
3
3
3
3
3
3
3
4
4
5
5
4
4
4
5
4
4
4
5
5
4

Chance of Frost

Temperature (°C)

12
12
12
12
12
11
11
11
11
13
15
16
18
18
19
19
19
18
16
16
15
14
13
13

Feels Like (°C)

13
12
12
11
11
11
12
12
12
14
16
17
17
18
18
20
18
16
15
14
13
12
11
11

Dew Point (°C)

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

Relative Humidity (%)

84
83
81
83
83
84
84
86
84
76
66
58
52
49
47
46
49
61
65
65
64
64
63
63

Pressure (mb)

1023
1023
1023
1023
1023
1022
1022
1022
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023

Ozone (du)

298
297
297
296
295
297
298
298
299
299
298
297
296
295
294
294
291
289
288
287
286
286
285
283

Tuesday 30

First Quarter 58%

16:50

23:37

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 OK
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 OK

Sun - Rise: 07:36, Set: 19:15, Transit: 13:26. Moon - Rise: 16:50, Set: 23:37. Civil Dark: 19:48 - 07:03. Nautical Dark: 20:28 - 06:24. Astro Dark: 21:08 - 05:43

Total Clouds (% Sky Obscured)

66
66
85
86
93
97
95
100
96
94
92
98
91
69
83
73
52
47
78
84
75
65
62
41

Low Clouds (% Sky Obscured)

66
63
65
55
65
82
84
89
83
81
66
55
52
58
66
43
41
29
33
29
17
9
1
1

Medium Clouds (% Sky Obscured)

50
61
73
74
75
45
44
39
54
62
53
53
70
51
55
71
50
44
49
46
22
18
12
6

High Clouds (% Sky Obscured)

10
10
10
10
5
5
10
10
11
14
66
93
64
26
37
49
48
47
64
67
52
39
40
26

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
1
1
1
1
0
3
2
1
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
4
4
3
4
4
4
4
4
5
5
5
5
6
6
7
9
9
7
6
6
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

60
59
60
58
58
59
63
66
68
66
62
57
53
52
50
48
45
46
51
60
66
67
60
57

Pressure (mb)

1023
1023
1024
1023
1023
1023
1023
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1026
1026
1027
1027
1027
1028

Ozone (du)

281
282
282
281
281
283
283
283
284
286
289
291
291
293
294
294
294
296
296
297
297
298
297
297

Wednesday 1

Waxing Gibbous 68%

17:20

No Set

00 OK
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 Good
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good
21 OK
22 OK
23 OK

Sun - Rise: 07:38, Set: 19:13, Transit: 13:25. Moon - Rise: 17:20, Set: No Set. Civil Dark: 19:46 - 07:05. Nautical Dark: 20:25 - 06:25. Astro Dark: 21:05 - 05:45

Total Clouds (% Sky Obscured)

21
2
2
1
1
1
1
0
0
0
0
0
0
0
3
5
8
6
4
3
17
29
36
24

Low Clouds (% Sky Obscured)

0
1
1
1
1
1
1
0
0
0
0
0
0
0
3
5
8
5
3
1
0
0
0
0

Medium Clouds (% Sky Obscured)

3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
17
29
36
24

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)

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

Chance of Frost

Temperature (°C)

10
9
8
8
7
7
6
6
6
8
10
12
13
14
15
16
16
16
14
12
11
10
9
8

Feels Like (°C)

7
7
6
6
5
5
4
3
4
6
8
10
10
11
12
13
13
13
13
11
9
8
7
7

Dew Point (°C)

1
0
0
1
1
2
2
1
1
2
1
1
1
1
1
2
2
2
3
4
4
3
3
3

Relative Humidity (%)

54
55
56
62
66
71
72
72
72
65
54
48
42
39
38
38
39
40
47
58
63
63
68
69

Pressure (mb)

1028
1028
1029
1029
1029
1029
1029
1030
1030
1031
1031
1032
1032
1031
1031
1031
1031
1031
1031
1031
1032
1032
1032
1033

Ozone (du)

296
297
297
296
295
296
296
296
296
295
295
295
294
293
292
292
292
291
290
288
288
287
287
287

Thursday 2

Waxing Gibbous 77%

17:42

00:55

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 Good
15 Good
16 OK
17 Good
18 Good
19 Good
20 Good
21 Good
22 Good
23 Good

Sun - Rise: 07:40, Set: 19:10, Transit: 13:25. Moon - Rise: 17:42, Set: 00:55. Civil Dark: 19:44 - 07:06. Nautical Dark: 20:23 - 06:27. Astro Dark: 21:03 - 05:47

Total Clouds (% Sky Obscured)

12
0
0
0
0
0
0
0
0
0
0
3
7
10
13
16
19
15
8
0
3
5
8
5

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
3
7
10
11
12
14
10
7
0
3
5
7
5

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

12
0
0
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
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)

7
6
6
6
6
6
5
5
5
5
6
6
7
8
8
8
8
8
8
7
6
6
5
5

Chance of Frost

Temperature (°C)

8
7
7
7
6
6
6
5
5
7
10
12
14
15
16
16
16
16
14
12
10
9
9
8

Feels Like (°C)

6
6
5
5
5
4
4
5
5
6
9
11
12
13
14
14
14
14
14
14
14
8
7
8

Dew Point (°C)

3
3
2
2
2
2
2
2
3
3
3
3
3
3
3
3
2
2
3
3
4
3
3
3

Relative Humidity (%)

69
71
72
72
72
74
76
80
82
74
62
55
48
44
41
41
40
40
48
54
63
66
69
71

Pressure (mb)

1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1034
1034
1033
1033
1032
1032
1031
1031
1031
1031
1031
1031
1031
1031

Ozone (du)

288
288
288
287
286
286
285
285
284
282
281
280
279
278
277
277
277
277
277
276
275
274
273
272

Friday 3

Waxing Gibbous 86%

17:58

02:18

00 Good
01 Good
02 Good
03 Good
04 OK
05 OK
06 OK
07 OK
08 OK
09 OK
10 OK
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

Sun - Rise: 07:41, Set: 19:08, Transit: 13:25. Moon - Rise: 17:58, Set: 02:18. Civil Dark: 19:42 - 07:08. Nautical Dark: 20:21 - 06:29. Astro Dark: 21:01 - 05:49

Total Clouds (% Sky Obscured)

3
4
11
17
27
27
34
38
39
34
35
37
45
66
67
68
70
78
87
96
96
97
97
88

Low Clouds (% Sky Obscured)

3
1
1
0
0
0
0
0
0
0
0
7
16
24
26
26
25
20
17
15
10
6
1
1

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
8
15
16

High Clouds (% Sky Obscured)

0
0
1
2
3
0
0
0
5
10
15
15
20
20
20
20
10
32
58
85
86
88
91
62

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
5
5
5
4
4
4
4
4
4
5
5
6
6
7
6
6
5
5
5
4
4
4
4

Chance of Frost

Temperature (°C)

8
7
7
6
6
6
6
5
5
7
9
11
12
13
14
14
14
14
13
11
10
9
8
8

Feels Like (°C)

7
7
7
5
5
4
4
4
3
3
4
5
5
6
7
12
11
11
11
12
12
6
6
7

Dew Point (°C)

3
3
3
3
3
3
3
2
2
2
2
3
2
2
2
2
2
2
2
2
2
2
1
-0

Relative Humidity (%)

73
74
76
78
79
80
80
79
79
69
61
55
50
47
43
43
42
41
47
52
58
59
59
57

Pressure (mb)

1030
1030
1030
1029
1029
1029
1028
1028
1028
1028
1028
1028
1027
1026
1026
1025
1025
1024
1024
1024
1024
1024
1025
1025

Ozone (du)

272
272
272
272
272
271
271
271
272
273
274
274
276
277
278
280
282
284
287
289
292
292
292
292

Saturday 4

Waxing Gibbous 93%

18:12

03:43

Sun - Rise: 07:43, Set: 19:06, Transit: 13:24. Moon - Rise: 18:12, Set: 03:43. Civil Dark: 19:39 - 07:09. Nautical Dark: 20:18 - 06:30. Astro Dark: 20:58 - 05:51

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Arnhem, Gemeente Arnhem, Netherlands (51.98,5.91)

Generated: 28/09/25 00:30:07. Forecast: 28/09/25 to 04/10/25. Timezone: UTC+2.00