Rockville weather by month
What a typical year looks like in Rockville, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Appleton City, 14 km from Rockville; records cover 1890–2026.
The year at a glance
- Precipitation a year
- 43.5 in1105 mm
- Snow a year
- 10 in25 cm
- Last spring freeze
- Apr 9
- First fall freeze
- Oct 25
- Heating degree days
- 4,822
- Cooling degree days
- 1,375
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 3°−16° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Rockville in January
Highs average 40°4° and lows 21°−6°, with 1.6 in40 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 77°25° (1950)
- Record low
- −22°−30° (1930)
- Heating degree days
- 1066
- Cooling degree days
- 0
Rockville in February
Highs average 45°7° and lows 25°−4°, with 1.7 in44 mm of precipitation and 2.3 in5.8 cm of snow in a typical February.
- Record high
- 83°28° (1911)
- Record low
- −29°−34° (1905)
- Heating degree days
- 836
- Cooling degree days
- 0
Rockville in March
Highs average 56°13° and lows 34°1°, with 3.2 in81 mm of precipitation and 1.3 in3.3 cm of snow in a typical March.
- Record high
- 94°34° (2026)
- Record low
- −7°−22° (1948)
- Heating degree days
- 619
- Cooling degree days
- 3
Rockville in April
Highs average 66°19° and lows 44°7°, with 4.6 in118 mm of precipitation in a typical April.
- Record high
- 94°34° (1902)
- Record low
- 13°−11° (1920)
- Heating degree days
- 320
- Cooling degree days
- 16
Rockville in May
Highs average 75°24° and lows 55°13°, with 5.9 in149 mm of precipitation in a typical May.
- Record high
- 100°38° (1934)
- Record low
- 26°−3° (1907)
- Heating degree days
- 105
- Cooling degree days
- 97
Rockville in June
Highs average 84°29° and lows 64°18°, with 4.7 in118 mm of precipitation in a typical June.
- Record high
- 110°43° (1901)
- Record low
- 41°5° (1897)
- Heating degree days
- 7
- Cooling degree days
- 274
Rockville in July
Highs average 88°31° and lows 69°20°, with 4.5 in114 mm of precipitation in a typical July.
- Record high
- 116°47° (1954)
- Record low
- 46°8° (1972)
- Heating degree days
- 0
- Cooling degree days
- 414
Rockville in August
Highs average 87°31° and lows 67°19°, with 4.1 in105 mm of precipitation in a typical August.
- Record high
- 112°44° (1936)
- Record low
- 44°7° (1988)
- Heating degree days
- 2
- Cooling degree days
- 373
Rockville in September
Highs average 79°26° and lows 58°15°, with 4.3 in110 mm of precipitation in a typical September.
- Record high
- 107°42° (1913)
- Record low
- 29°−2° (1942)
- Heating degree days
- 51
- Cooling degree days
- 164
Rockville in OctoberThis month
Highs average 68°20° and lows 46°8°, with 3.4 in85 mm of precipitation in a typical October.
- Record high
- 100°38° (1899)
- Record low
- 18°−8° (1917)
- Heating degree days
- 275
- Cooling degree days
- 32
Rockville in November
Highs average 55°13° and lows 35°2°, with 3.2 in81 mm of precipitation and 0.3 in0.8 cm of snow in a typical November.
- Record high
- 90°32° (1915)
- Record low
- 1°−17° (1932)
- Heating degree days
- 605
- Cooling degree days
- 2
Rockville in December
Highs average 44°7° and lows 26°−4°, with 2.3 in59 mm of precipitation and 2.1 in5.3 cm of snow in a typical December.
- Record high
- 78°26° (2025)
- Record low
- −22°−30° (1989)
- Heating degree days
- 936
- Cooling degree days
- 0