| Point Forecast: Irmo SC 34.08N 81.18W (Elev. 299 ft) |
Last Update: 3:01 pm EDT Jul 18, 2026 |
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| Date | 07/18 | 07/19 | ||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 83 | 82 | 81 | 80 | 80 | 78 | 78 | 78 | 76 | 78 | 81 | 86 | 88 | 91 | 92 | 93 | 94 | 95 | 93 | 93 | 91 | 88 | 86 | 84 |
| Dewpoint (°F) | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 74 | 75 | 75 | 76 | 75 | 74 | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 |
| Heat Index (°F) | 90 | 88 | 86 | 84 | 84 | 78 | 78 | 78 | 76 | 78 | 86 | 95 | 98 | 103 | 103 | 103 | 105 | 106 | 103 | 103 | 101 | 96 | 93 | 90 |
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 7 | 5 | 3 | 3 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 47 | 39 | 36 | 28 | 30 | 20 | 27 | 28 | 34 | 24 | 10 | 9 | 7 | 29 | 26 | 40 | 27 | 39 | 48 | 48 | 50 | 56 | 54 | 61 |
| Precipitation Potential (%) | 21 | 10 | 8 | 5 | 5 | 5 | 2 | 1 | 3 | 3 | 2 | 1 | 3 | 6 | 5 | 8 | 10 | 12 | 21 | 9 | 24 | 20 | 14 | 21 |
| Relative Humidity (%) | 74 | 77 | 79 | 79 | 79 | 85 | 85 | 85 | 90 | 85 | 79 | 70 | 66 | 62 | 58 | 54 | 53 | 51 | 54 | 54 | 58 | 61 | 65 | 70 |
| Rain | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | SChc | SChc | -- | SChc |
| Thunder | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | -- | SChc | SChc | -- | SChc |
| Date | 07/20 | |||||||||||||||||||||||
| Hour (EDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°F) | 83 | 82 | 81 | 80 | 79 | 78 | 77 | 77 | 76 | 78 | 81 | 84 | 88 | 90 | 92 | 93 | 93 | 93 | 93 | 91 | 89 | 87 | 85 | 84 |
| Dewpoint (°F) | 73 | 73 | 73 | 72 | 72 | 72 | 72 | 72 | 72 | 73 | 74 | 75 | 75 | 75 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 73 |
| Heat Index (°F) | 89 | 87 | 86 | 84 | 79 | 78 | 77 | 77 | 76 | 78 | 86 | 92 | 98 | 101 | 102 | 103 | 103 | 102 | 102 | 100 | 97 | 94 | 92 | 90 |
| Surface Wind (mph) | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 65 | 54 | 52 | 37 | 42 | 40 | 38 | 36 | 39 | 27 | 49 | 37 | 24 | 36 | 48 | 60 | 60 | 60 | 60 | 60 | 60 | 30 | 29 | 27 |
| Precipitation Potential (%) | 18 | 26 | 28 | 14 | 14 | 10 | 10 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 40 | 40 | 40 | 40 | 40 | 40 | 13 | 13 | 13 |
| Relative Humidity (%) | 72 | 74 | 77 | 77 | 79 | 82 | 85 | 85 | 87 | 85 | 79 | 74 | 66 | 62 | 56 | 54 | 54 | 52 | 52 | 56 | 59 | 63 | 67 | 70 |
| Rain | SChc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- |
| Thunder | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- |
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