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| Point Forecast: Lambert-St. Louis International Airport MO 38.76N 90.37W (Elev. 551 ft) |
Last Update: 8:25 pm CDT May 13, 2021 |
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| Date | 05/13 | 05/14 | ||||||||||||||||||||||
| Hour (CDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 61 | 58 | 56 | 54 | 53 | 52 | 51 | 50 | 48 | 48 | 50 | 54 | 60 | 65 | 67 | 69 | 69 | 69 | 70 | 70 | 70 | 69 | 68 | 65 |
| Dewpoint (°F) | 36 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 37 | 36 | 36 | 36 | 36 | 37 | 37 | 38 | 38 | 39 | 40 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 8 |
| Wind Dir | E | SE | SE | SE | SE | SE | SE | S | SE | SE | SE | SE | SE | S | S | S | S | S | SE | SE | SE | SE | SE | SE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 7 | 3 | 3 | 3 | 4 | 4 | 2 | 4 | 9 | 16 | 24 | 17 | 17 | 20 | 30 | 47 | 58 | 60 | 58 | 58 | 54 | 54 | 60 | 60 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 | 8 | 7 | 7 | 5 | 5 | 6 | 6 |
| Relative Humidity (%) | 39 | 44 | 47 | 52 | 54 | 56 | 59 | 61 | 65 | 65 | 63 | 54 | 44 | 35 | 32 | 30 | 30 | 30 | 30 | 30 | 31 | 32 | 34 | 40 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/15 | |||||||||||||||||||||||
| Hour (CDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 63 | 61 | 59 | 58 | 57 | 57 | 56 | 56 | 55 | 55 | 56 | 58 | 61 | 63 | 65 | 67 | 68 | 69 | 70 | 70 | 69 | 68 | 66 | 64 |
| Dewpoint (°F) | 41 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 44 | 44 | 45 | 46 | 46 | 47 | 47 | 48 | 48 | 49 | 49 | 50 | 51 | 51 | 52 | 52 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 8 | 7 | 8 | 8 | 8 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 |
| Wind Dir | SE | SE | SE | SE | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 61 | 61 | 63 | 66 | 66 | 69 | 72 | 76 | 78 | 81 | 85 | 83 | 78 | 75 | 76 | 77 | 77 | 79 | 82 | 84 | 85 | 87 | 88 | 86 |
| Precipitation Potential (%) | 6 | 6 | 6 | 6 | 16 | 16 | 16 | 16 | 16 | 16 | 25 | 25 | 25 | 25 | 25 | 25 | 42 | 42 | 42 | 42 | 42 | 42 | 47 | 47 |
| Relative Humidity (%) | 44 | 49 | 53 | 55 | 57 | 59 | 62 | 62 | 66 | 66 | 66 | 64 | 58 | 56 | 52 | 50 | 49 | 49 | 47 | 49 | 53 | 54 | 61 | 65 |
| Rain | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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