| Point Forecast: Elgin IL 42.03N 88.28W |
Last Update: 2:41 pm CDT May 17, 2026 |
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| Date | 05/17 | 05/18 | ||||||||||||||||||||||
| Hour (CDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 82 | 78 | 76 | 75 | 74 | 73 | 71 | 70 | 69 | 69 | 68 | 67 | 67 | 69 | 71 | 74 | 76 | 78 | 78 | 80 | 80 | 79 | 80 | 80 |
| Dewpoint (°F) | 63 | 63 | 63 | 62 | 60 | 60 | 59 | 59 | 58 | 58 | 59 | 59 | 60 | 62 | 65 | 66 | 67 | 68 | 68 | 69 | 70 | 70 | 69 | 69 |
| Heat Index (°F) | 83 | 78 | 76 | 75 | 76 | 78 | 78 | 82 | 83 | 82 | 83 | 82 | ||||||||||||
| Surface Wind (mph) | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 18 | 17 |
| Wind Dir | SSW | SSW | S | S | S | S | S | S | S | SSW | S | SSW | SSW | SSW | S | SSW | SSW | S | SSW | SSW | SSW | SSW | SSW | SSW |
| Gust | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 |
| Sky Cover (%) | 59 | 52 | 39 | 26 | 15 | 17 | 17 | 27 | 27 | 36 | 37 | 46 | 47 | 50 | 73 | 72 | 85 | 83 | 89 | 87 | 81 | 90 | 76 | 77 |
| Precipitation Potential (%) | 2 | 1 | 1 | 2 | 2 | 2 | 1 | 1 | 2 | 7 | 29 | 36 | 74 | 74 | 72 | 63 | 68 | 53 | 41 | 41 | 37 | 30 | 30 | 29 |
| Relative Humidity (%) | 53 | 59 | 63 | 63 | 62 | 62 | 66 | 66 | 68 | 69 | 71 | 74 | 78 | 80 | 80 | 75 | 73 | 72 | 71 | 71 | 72 | 72 | 69 | 71 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Date | 05/19 | |||||||||||||||||||||||
| Hour (CDT) | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Temperature (°F) | 78 | 76 | 74 | 70 | 69 | 68 | 68 | 67 | 66 | 66 | 65 | 64 | 65 | 68 | 72 | 76 | 78 | 79 | 79 | 79 | 79 | 79 | 77 | 75 |
| Dewpoint (°F) | 69 | 69 | 68 | 66 | 65 | 65 | 64 | 64 | 63 | 63 | 64 | 63 | 64 | 65 | 66 | 67 | 67 | 67 | 67 | 66 | 65 | 63 | 62 | 60 |
| Heat Index (°F) | 78 | 76 | 76 | 78 | 79 | 79 | 81 | 79 | 79 | 77 | 75 | |||||||||||||
| Surface Wind (mph) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 20 | 20 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 22 | 21 | 20 | 17 | 16 | 16 |
| Wind Dir | SSW | SSW | SSW | S | S | S | S | S | S | SSW | SSW | SSW | SSW | SSW | SW | SW | SW | WSW | WSW | WSW | W | W | WNW | WNW |
| Gust | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 28 | 29 | 30 | 30 | 31 | 32 | 32 | 33 | 33 | 33 | 32 | 32 | 30 | 28 | 25 | 24 | 23 |
| Sky Cover (%) | 53 | 33 | 40 | 47 | 65 | 59 | 73 | 73 | 47 | 68 | 59 | 62 | 87 | 69 | 72 | 74 | 72 | 71 | 69 | 71 | 72 | 74 | 71 | 68 |
| Precipitation Potential (%) | 27 | 25 | 20 | 16 | 10 | 5 | 40 | 40 | 40 | 66 | 66 | 66 | 72 | 72 | 72 | 72 | 72 | 72 | 43 | 43 | 43 | 43 | 43 | 43 |
| Relative Humidity (%) | 75 | 78 | 82 | 86 | 87 | 88 | 88 | 89 | 91 | 92 | 94 | 96 | 96 | 90 | 80 | 72 | 68 | 67 | 66 | 64 | 62 | 59 | 58 | 58 |
| Rain | Chc | Chc | SChc | SChc | -- | -- | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | SChc | Chc | SChc | SChc | -- | -- | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | -- | -- | -- |
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