Washington weather by month
What a typical year looks like in Washington, Utah: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at ST. GEORGE, 11 km from Washington; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 9.3 in236 mm
- Snow a year
- 1.2 in3 cm
- Last spring freeze
- Mar 3
- First fall freeze
- Nov 16
- Heating degree days
- 3,206
- Cooling degree days
- 2,417
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 21°−6° (heating, 99%) and 110°43° (cooling, 1%).
Month by month
Washington in January
Highs average 54°12° and lows 28°−2°, with 1.2 in31 mm of precipitation and 0.5 in1.3 cm of snow in a typical January.
- Record high
- 72°22° (1931)
- Record low
- −11°−24° (1937)
- Heating degree days
- 738
- Cooling degree days
- 0
Washington in February
Highs average 59°15° and lows 32°0°, with 1.4 in35 mm of precipitation and 0.5 in1.3 cm of snow in a typical February.
- Record high
- 84°29° (1986)
- Record low
- 1°−17° (1899)
- Heating degree days
- 536
- Cooling degree days
- 0
Washington in March
Highs average 68°20° and lows 39°4°, with 1 in26 mm of precipitation and 0.2 in0.5 cm of snow in a typical March.
- Record high
- 97°36° (2026)
- Record low
- 12°−11° (1897)
- Heating degree days
- 362
- Cooling degree days
- 2
Washington in April
Highs average 75°24° and lows 46°8°, with 0.66 in17 mm of precipitation in a typical April.
- Record high
- 100°38° (1946)
- Record low
- 18°−8° (1896)
- Heating degree days
- 170
- Cooling degree days
- 31
Washington in May
Highs average 85°30° and lows 56°13°, with 0.33 in8.4 mm of precipitation in a typical May.
- Record high
- 108°42° (1910)
- Record low
- 20°−7° (1899)
- Heating degree days
- 38
- Cooling degree days
- 207
Washington in June
Highs average 96°36° and lows 65°18°, with 0.16 in4.1 mm of precipitation in a typical June.
- Record high
- 115°46° (1918)
- Record low
- 35°2° (1895)
- Heating degree days
- 2
- Cooling degree days
- 466
Washington in July
Highs average 102°39° and lows 72°22°, with 0.5 in13 mm of precipitation in a typical July.
- Record high
- 117°47° (1985)
- Record low
- 41°5° (1893)
- Heating degree days
- 0
- Cooling degree days
- 676
Washington in August
Highs average 100°38° and lows 70°21°, with 1.1 in27 mm of precipitation in a typical August.
- Record high
- 115°46° (2020)
- Record low
- 40°4° (1894)
- Heating degree days
- 0
- Cooling degree days
- 623
Washington in September
Highs average 92°34° and lows 61°16°, with 0.67 in17 mm of precipitation in a typical September.
- Record high
- 112°44° (2022)
- Record low
- 25°−4° (1895)
- Heating degree days
- 5
- Cooling degree days
- 351
Washington in OctoberThis month
Highs average 79°26° and lows 47°8°, with 0.77 in20 mm of precipitation in a typical October.
- Record high
- 101°38° (2024)
- Record low
- 20°−7° (1895)
- Heating degree days
- 121
- Cooling degree days
- 61
Washington in November
Highs average 64°18° and lows 35°2°, with 0.67 in17 mm of precipitation in a typical November.
- Record high
- 88°31° (1945)
- Record low
- 4°−16° (1896)
- Heating degree days
- 473
- Cooling degree days
- 0
Washington in December
Highs average 53°12° and lows 28°−2°, with 0.86 in22 mm of precipitation in a typical December.
- Record high
- 75°24° (1941)
- Record low
- −4°−20° (1909)
- Heating degree days
- 761
- Cooling degree days
- 0