| Point Forecast: Grundy Center IA 42.36N 92.76W |
Last Update: 6:51 am CDT Sep 11, 2026 |
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| Date | 09/11 | 09/12 | ||||||||||||||||||||||
| Hour (CDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°F) | 60 | 65 | 70 | 73 | 76 | 77 | 78 | 79 | 79 | 80 | 78 | 76 | 75 | 70 | 69 | 69 | 68 | 68 | 67 | 67 | 66 | 66 | 66 | 65 |
| Dewpoint (°F) | 56 | 59 | 60 | 60 | 60 | 61 | 62 | 63 | 63 | 63 | 63 | 61 | 61 | 61 | 61 | 61 | 61 | 62 | 62 | 63 | 63 | 63 | 63 | 63 |
| Heat Index (°F) | 76 | 77 | 78 | 79 | 79 | 81 | 78 | 76 | 75 | |||||||||||||||
| Surface Wind (mph) | 6 | 8 | 9 | 10 | 11 | 13 | 13 | 14 | 14 | 14 | 13 | 11 | 11 | 13 | 14 | 13 | 11 | 11 | 11 | 11 | 11 | 9 | 8 | 7 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | SSE | SSE | S | S | S | S | S | S | SSW | SSW | SSW | SW | SW |
| Gust | 20 | 22 | 20 | 18 | 18 | 20 | 18 | |||||||||||||||||
| Sky Cover (%) | 1 | 0 | 1 | 1 | 2 | 12 | 7 | 26 | 28 | 31 | 17 | 54 | 71 | 43 | 31 | 33 | 35 | 32 | 48 | 52 | 50 | 31 | 32 | 35 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 10 | 18 | 20 | 9 | 6 | 6 | 4 |
| Relative Humidity (%) | 87 | 81 | 71 | 64 | 58 | 58 | 58 | 58 | 58 | 56 | 60 | 60 | 62 | 73 | 76 | 76 | 78 | 81 | 84 | 87 | 90 | 90 | 90 | 93 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | -- | -- | -- | -- |
| Date | 09/13 | |||||||||||||||||||||||
| Hour (CDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°F) | 66 | 68 | 71 | 73 | 75 | 76 | 77 | 77 | 78 | 77 | 75 | 73 | 69 | 66 | 64 | 63 | 62 | 61 | 60 | 58 | 57 | 56 | 55 | 55 |
| Dewpoint (°F) | 64 | 65 | 64 | 63 | 62 | 60 | 60 | 58 | 57 | 56 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 49 |
| Heat Index (°F) | 75 | 76 | 77 | 77 | 78 | 77 | 75 | |||||||||||||||||
| Surface Wind (mph) | 9 | 11 | 13 | 11 | 11 | 10 | 10 | 10 | 9 | 8 | 7 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Wind Dir | WSW | WNW | NW | NNW | N | N | N | N | N | N | N | N | N | N | N | N | N | N | N | NNE | NNE | NNE | NE | NE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 31 | 45 | 45 | 16 | 16 | 16 | 29 | 23 | 14 | 17 | 24 | 9 | 10 | 5 | 21 | 13 | 23 | 27 | 13 | 19 | 25 | 38 | 41 | 44 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 33 |
| Relative Humidity (%) | 93 | 90 | 79 | 71 | 64 | 58 | 56 | 52 | 48 | 48 | 52 | 53 | 59 | 63 | 65 | 65 | 65 | 67 | 69 | 75 | 77 | 77 | 80 | 80 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
