Somerville weather by month
What a typical year looks like in Somerville, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at BRENHAM, 24 km from Somerville; records cover 1897–2026.
The year at a glance
- Precipitation a year
- 48 in1220 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 27
- First fall freeze
- Dec 1
- Heating degree days
- 1,737
- Cooling degree days
- 2,852
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 27°−3° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Somerville in January
Highs average 61°16° and lows 40°4°, with 3.7 in93 mm of precipitation in a typical January.
- Record high
- 87°31° (2017)
- Record low
- −2°−19° (1930)
- Heating degree days
- 467
- Cooling degree days
- 8
Somerville in February
Highs average 64°18° and lows 43°6°, with 3.4 in85 mm of precipitation in a typical February.
- Record high
- 94°34° (1986)
- Record low
- 0°−18° (1899)
- Heating degree days
- 330
- Cooling degree days
- 14
Somerville in March
Highs average 71°22° and lows 49°10°, with 3.6 in92 mm of precipitation in a typical March.
- Record high
- 97°36° (1946)
- Record low
- 17°−8° (1943)
- Heating degree days
- 196
- Cooling degree days
- 45
Somerville in April
Highs average 78°26° and lows 57°14°, with 3.6 in90 mm of precipitation in a typical April.
- Record high
- 98°37° (1951)
- Record low
- 32°0° (1928)
- Heating degree days
- 55
- Cooling degree days
- 126
Somerville in May
Highs average 85°29° and lows 65°18°, with 5.4 in137 mm of precipitation in a typical May.
- Record high
- 101°38° (1925)
- Record low
- 41°5° (2008)
- Heating degree days
- 5
- Cooling degree days
- 312
Somerville in June
Highs average 91°33° and lows 72°22°, with 4.5 in113 mm of precipitation in a typical June.
- Record high
- 105°41° (1980)
- Record low
- 53°12° (1919)
- Heating degree days
- 0
- Cooling degree days
- 487
Somerville in July
Highs average 94°34° and lows 74°23°, with 2.6 in66 mm of precipitation in a typical July.
- Record high
- 109°43° (1917)
- Record low
- 58°14° (1967)
- Heating degree days
- 0
- Cooling degree days
- 581
Somerville in August
Highs average 95°35° and lows 74°23°, with 3.8 in97 mm of precipitation in a typical August.
- Record high
- 111°44° (1909)
- Record low
- 59°15° (1967)
- Heating degree days
- 0
- Cooling degree days
- 600
Somerville in September
Highs average 90°32° and lows 68°20°, with 4.6 in117 mm of precipitation in a typical September.
- Record high
- 113°45° (2000)
- Record low
- 43°6° (1942)
- Heating degree days
- 1
- Cooling degree days
- 424
Somerville in OctoberThis month
Highs average 81°27° and lows 59°15°, with 5.1 in129 mm of precipitation in a typical October.
- Record high
- 99°37° (1898)
- Record low
- 29°−2° (1917)
- Heating degree days
- 44
- Cooling degree days
- 197
Somerville in November
Highs average 70°21° and lows 48°9°, with 4.2 in107 mm of precipitation in a typical November.
- Record high
- 97°36° (2025)
- Record low
- 21°−6° (1911)
- Heating degree days
- 220
- Cooling degree days
- 45
Somerville in December
Highs average 63°17° and lows 41°5°, with 3.7 in94 mm of precipitation in a typical December.
- Record high
- 87°31° (1928)
- Record low
- 4°−16° (1989)
- Heating degree days
- 419
- Cooling degree days
- 13