| Month | Average (°F) | Record (°F) | Average (inches) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 41.2 | 27.6 | 74 | -27 | 1.0 |
| February | 48.3 | 28.7 | 73 | -22 | 0.6 |
| March | 58.4 | 33.4 | 87 | 7 | 0.7 |
| April | 66.7 | 39.3 | 95 | 18 | 0.6 |
| May | 75.9 | 46.8 | 105 | 26 | 0.7 |
| June | 82.6 | 53.1 | 115 | 37 | 0.6 |
| July | 91.7 | 57.9 | 115 | 38 | 0.2 |
| August | 90.6 | 56.8 | 115 | 37 | 0.2 |
| September | 80.4 | 48.2 | 106 | 21 | 0.3 |
| October | 65.6 | 39.3 | 93 | 13 | 0.6 |
| November | 50.0 | 31.7 | 78 | -7 | 0.8 |
| December | 40.7 | 27.5 | 69 | -29 | 1.0 |
| Entire year | 66.1 | 40.8 | 115 | -29 | 7.4 |
|
More Richland Weather Records
1894–2024
|
||
|---|---|---|
| Highest daily low | 82 °F | July 14, 1906 |
| Lowest daily high | -2 °F | December 14, 1919 |
| Greatest daily range (Difference of high and low) |
58 °F | May 22, 1910 |
| Greatest difference in daily high over two conscutive days |
43 °F | Sep 4–5, 1911 |
| Most daily precipitation | 2.0 inches | November 20, 1921 |
| Most monthly precipitation | 3.6 inches | February 1940 |
| Most yearly precipitation | 12.2 inches | 1940 |
| Most yearly days with precipitation | 108 | 2010 |
| Earliest freeze | September 12 | 1921 |
| Earliest day ≥ 80 °F | March 19 | 2024 |
| Earliest day ≥ 90 °F | April 17 | 1910 |
| Earliest day ≥ 100 °F | May 12 | 1949 |
| Latest freeze | May 18 | 1905 |
| Latest day ≥ 80 °F | October 26 | 1955 |
| Latest day ≥ 90 °F | October 6 | 2020 |
| Latest day ≥ 100 °F | September 14 | 1948 |
| Most days in a year < 0 °F | 12 | 1930 |
| Most days in a year < 32 °F | 129 | 2013 |
| Most days in a year ≥ 80 °F | 136 | 1958 |
| Most days in a year ≥ 90 °F | 88 | 1958 |
| Most days in a year ≥ 100 °F | 40 | 1958 |
| Most days in a year ≥ 110 °F | 5 | 2021 |
|
Richland Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 11 days | Dec 8–18, 1929 |
| Without precipitation | 107 days | Jun 1 – Sep 15, 1949 |
| High temperature at or below freezing |
25 days | Jan 7–31, 1930 |
| High temperature ≥ 80 °F | 89 days | Jun 17 – Sep 13, 2017 |
| High temperature ≥ 90 °F | 37 days | Jul 19 – Aug 24, 1942 |
| High temperature ≥ 100 °F | 11 days | Jul 24 – Aug 3, 2022 |
| High temperature ≥ 110 °F | 5 days | Jun 26–30, 2021 |