| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 39.0 | 22.0 | 78 | -19 | 2.9 | 7.9 |
| February | 42.0 | 22.8 | 79 | -14 | 2.1 | 6.3 |
| March | 51.6 | 29.9 | 88 | -2 | 3.1 | 4.1 |
| April | 64.9 | 39.9 | 92 | 11 | 3.3 | 0.1 |
| May | 73.4 | 49.8 | 96 | 22 | 4.2 | 0.0 |
| June | 81.3 | 59.1 | 101 | 37 | 4.2 | 0.0 |
| July | 84.4 | 63.1 | 105 | 40 | 4.2 | 0.0 |
| August | 83.9 | 61.9 | 105 | 38 | 3.6 | 0.0 |
| September | 77.6 | 54.8 | 103 | 31 | 3.3 | 0.0 |
| October | 65.9 | 43.1 | 95 | 17 | 2.9 | 0.0 |
| November | 54.3 | 34.1 | 85 | -1 | 2.8 | 0.5 |
| December | 43.6 | 27.0 | 77 | -11 | 2.9 | 3.5 |
| Entire year | 63.5 | 42.2 | 105 | -19 | 39.2 | 21.6 |
|
More Donora Weather Records
1926–2024
|
||
|---|---|---|
| Highest daily low | 80 °F | August 2, 1933 |
| Lowest daily high | -1 °F | January 24, 1936 |
| Greatest daily range (Difference of high and low) |
58 °F | February 20, 1934 |
| Greatest difference in daily high over two conscutive days |
45 °F | Jan 22–23, 1959 |
| Most daily precipitation | 4.4 inches | September 18, 2004 |
| Most monthly precipitation | 10.6 inches | November 1985 |
| Most yearly precipitation | 52.8 inches | 2011 |
| Most yearly days with precipitation | 175 | 2003 |
| Earliest snow in season | October 27 | 1957 |
| Latest snow in season | May 1 | 1963 |
| Most daily snow | 20.0 inches | March 13, 1993 |
| Most monthly snow | 43.0 inches | January 2016 |
| Most yearly snow | 61.4 inches | 1960 |
| Most snow in a winter | 60.9 inches | 1960–1961 |
| Greatest snow accumulation | 26.0 inches | January 20, 1978 |
| Earliest freeze | September 29 | 1942 |
| Earliest day ≥ 80 °F | March 5 | 1992 |
| Earliest day ≥ 90 °F | April 11 | 1930 |
| Earliest day ≥ 100 °F | June 8 | 1933 |
| Latest freeze | May 30 | 1961 |
| Latest day ≥ 80 °F | November 27 | 1990 |
| Latest day ≥ 90 °F | October 11 | 1949 |
| Latest day ≥ 100 °F | September 4 | 1953 |
| Most days in a year < 0 °F | 12 | 1977 |
| Most days in a year < 32 °F | 137 | 1961 |
| Most days in a year ≥ 80 °F | 143 | 1991 |
| Most days in a year ≥ 90 °F | 57 | 1955 |
| Most days in a year ≥ 100 °F | 10 | 1930 |
|
Donora Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 13 days | Dec 28, 2009 – Jan 9, 2010 |
| Without precipitation | 29 days | Sep 3 – Oct 1, 1969 |
| With snow | 9 days | Jan 19–27, 1961 |
| High temperature at or below freezing |
18 days | Jan 12–29, 2003 |
| High temperature ≥ 80 °F | 79 days | Jun 24 – Sep 10, 1959 |
| High temperature ≥ 90 °F | 15 days | Jul 5–19, 1988 |
| High temperature ≥ 100 °F | 5 days | Aug 2–6, 1930 |
| Years | Station | Coordinates |
|---|---|---|
| 1926–2024 | Donora 1 SW | location |