Letts, IA
Climate overview — based on NOAA 1991-2020 normals from COLUMBUS JUNCTION, IA US.
Year-round temperatures (°F)
Climate summary
Letts has an annual average temperature of 48.8°F with about 38.8 inches of precipitation per year and 31.3 inches of snow. The warmest month is July (average high 83.9°F), and the coldest is January (average low 10.9°F). May is typically the wettest month (5.41 in) and January the driest (1.17 in). Snow typically falls from October through April.
Best time to visit Letts
Full guide →Climate change signal
All-time records →18 of 366 (4.9%) of Letts's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1900s | 31 | |
| 1910s | 22 | |
| 1920s | 29 | |
| 1930s | 66 | |
| 1940s | 24 | |
| 1950s | 43 | |
| 1960s | 35 | |
| 1970s | 22 | |
| 1980s | 41 | |
| 1990s | 22 | |
| 2000s | 13 | |
| 2020s | 18 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 29.9°F | 10.9°F | 20.4°F | 1.17 in | 9.5 in | 8 |
| February | 34.3°F | 14.0°F | 24.1°F | 1.94 in | 7.1 in | 7 |
| March | 48.0°F | 25.8°F | 36.9°F | 2.33 in | 5.3 in | 9 |
| April | 61.5°F | 37.9°F | 49.7°F | 3.85 in | 1.6 in | 11 |
| May | 71.5°F | 49.5°F | 60.5°F | 5.41 in | — | 12 |
| June | 80.1°F | 59.2°F | 69.6°F | 4.91 in | — | 10 |
| July | 83.9°F | 62.9°F | 73.4°F | 4.09 in | — | 9 |
| August | 82.4°F | 60.7°F | 71.6°F | 4.22 in | — | 9 |
| September | 76.3°F | 51.5°F | 63.9°F | 3.75 in | — | 8 |
| October | 63.1°F | 39.7°F | 51.4°F | 3.03 in | 0.2 in | 8 |
| November | 48.4°F | 26.9°F | 37.7°F | 2.19 in | 1.3 in | 8 |
| December | 35.2°F | 17.2°F | 26.2°F | 1.94 in | 6.3 in | 7 |
Climate twins of Letts
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).