| Point Forecast: Dekalb IL 41.9N 88.76W |
Last Update: 4:11 am CDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (CDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°C) | 18 | 20 | 22 | 24 | 26 | 27 | 28 | 29 | 30 | 31 | 31 | 31 | 29 | 29 | 27 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 22 |
| Dewpoint (°C) | 17 | 18 | 19 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 |
| Heat Index (°C) | 24 | 28 | 29 | 31 | 31 | 32 | 33 | 33 | 33 | 32 | 32 | 28 | 25 | 24 | 24 | |||||||||
| Surface Wind (mph) | 3 | 3 | 5 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 2 |
| Wind Dir | SE | SSE | SSE | S | S | S | S | S | S | S | S | S | S | S | S | S | SSE | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 6 | 10 | 4 | 3 | 13 | 16 | 20 | 22 | 15 | 25 | 28 | 18 | 26 | 26 | 17 | 22 | 44 | 15 | 16 | 23 | 30 | 42 | 64 | 68 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 14 | 14 | 14 | 11 | 11 | 11 | 11 | 8 | 7 | 6 | 6 | 6 | 4 | 4 | 4 | 3 | 3 |
| Relative Humidity (%) | 93 | 92 | 84 | 78 | 71 | 66 | 63 | 60 | 58 | 55 | 55 | 55 | 61 | 64 | 75 | 83 | 87 | 89 | 92 | 94 | 94 | 96 | 95 | 97 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (CDT) | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 |
| Temperature (°C) | 22 | 23 | 24 | 25 | 27 | 28 | 30 | 31 | 31 | 31 | 31 | 30 | 29 | 27 | 26 | 24 | 23 | 22 | 22 | 22 | 21 | 21 | 20 | 19 |
| Dewpoint (°C) | 22 | 22 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 19 |
| Heat Index (°C) | 24 | 25 | 30 | 33 | 34 | 35 | 36 | 36 | 35 | 34 | 32 | 29 | 26 | 24 | ||||||||||
| Surface Wind (mph) | 2 | 3 | 3 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 |
| Wind Dir | SSW | SSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 69 | 73 | 66 | 64 | 48 | 29 | 31 | 33 | 40 | 47 | 54 | 57 | 60 | 63 | 65 | 66 | 68 | 72 | 76 | 80 | 81 | 83 | 84 | 88 |
| Precipitation Potential (%) | 3 | 7 | 7 | 7 | 7 | 7 | 7 | 48 | 48 | 48 | 48 | 48 | 48 | 64 | 64 | 64 | 64 | 64 | 64 | 54 | 54 | 54 | 54 | 54 |
| Relative Humidity (%) | 98 | 97 | 94 | 90 | 83 | 75 | 69 | 65 | 62 | 61 | 62 | 64 | 69 | 75 | 82 | 89 | 93 | 96 | 98 | 98 | 99 | 100 | 100 | 100 |
| Rain | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc |
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