| Point Forecast: Chambersburg PA 39.93N 77.66W (Elev. 188 m) |
Last Update: 11:24 pm EDT Jul 12, 2025 |
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| Date | 07/13 | 07/14 | ||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 23 | 23 | 23 | 22 | 22 | 22 | 24 | 26 | 27 | 28 | 29 | 30 | 31 | 31 | 30 | 29 | 28 | 28 | 26 | 25 | 24 | 23 | 23 | 22 |
| Dewpoint (°C) | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 23 | 22 | 22 |
| Heat Index (°C) | 24 | 26 | 29 | 32 | 34 | 36 | 37 | 36 | 35 | 33 | 32 | 31 | 26 | 25 | 24 | |||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 5 | 5 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | SE | S | SW | S | S | SE | SE | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 62 | 58 | 61 | 66 | 73 | 73 | 73 | 65 | 69 | 58 | 58 | 53 | 61 | 62 | 73 | 82 | 80 | 83 | 84 | 84 | 85 | 85 | 85 | 85 |
| Precipitation Potential (%) | 14 | 14 | 18 | 15 | 12 | 6 | 4 | 6 | 5 | 9 | 19 | 30 | 42 | 43 | 60 | 72 | 70 | 64 | 76 | 76 | 76 | 76 | 76 | 76 |
| Relative Humidity (%) | 97 | 97 | 97 | 97 | 100 | 100 | 94 | 85 | 82 | 79 | 77 | 72 | 70 | 68 | 70 | 74 | 77 | 77 | 82 | 94 | 100 | 97 | 97 | 100 |
| Rain | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | -- | SChc | Chc | Chc | Chc | Chc | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | Chc | Chc | Chc | Chc | Ocnl | Ocnl | Ocnl | Chc | Chc | Chc | Chc | Chc | Chc |
| Date | 07/15 | |||||||||||||||||||||||
| Hour (EDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 26 | 28 | 29 | 30 | 31 | 31 | 31 | 31 | 30 | 29 | 28 | 27 | 26 | 24 | 23 | 22 |
| Dewpoint (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 |
| Heat Index (°C) | 24 | 26 | 31 | 32 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 31 | 28 | 26 | 24 | |||||||||
| Surface Wind (mph) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 0 |
| Wind Dir | S | S | S | SW | SW | SW | SW | W | W | NW | NW | NW | NW | NW | NW | NW | NW | N | N | NW | W | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 85 | 79 | 74 | 68 | 65 | 61 | 58 | 49 | 40 | 31 | 38 | 45 | 52 | 52 | 52 | 52 | 52 | 52 | 15 | 16 | 16 | 17 | 18 | 18 |
| Precipitation Potential (%) | 28 | 28 | 28 | 28 | 28 | 28 | 11 | 11 | 11 | 11 | 11 | 11 | 28 | 28 | 28 | 28 | 28 | 28 | 9 | 9 | 9 | 9 | 9 | 9 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 100 | 97 | 93 | 85 | 79 | 72 | 67 | 61 | 57 | 54 | 54 | 55 | 57 | 61 | 65 | 72 | 76 | 82 | 84 | 87 |
| Rain | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | SChc | SChc | SChc | -- | -- | -- | -- | -- | -- |
