Rio Vista weather by month
What a typical year looks like in Rio Vista, California: average highs and lows, rain and snow, and the warmest and coldest days on record. No nearby active station has official 1991–2020 normals, so these are forecast.blue’s own averages computed from daily observations at Travis Field AFB, 22 km from Rio Vista, over its available record (1947–2026) — not an NCEI normal; records cover 1947–2026.
The year at a glance
- Precipitation a year
- 16.6 in422 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 3
- First fall freeze
- Dec 1
- Heating degree days
- —
- Cooling degree days
- —
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 29°−2° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Rio Vista in January
Highs average 54°12° and lows 39°4°, with 3.5 in89 mm of precipitation in a typical January.
- Record high
- 78°26° (1962)
- Record low
- 19°−7° (1968)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in February
Highs average 60°15° and lows 43°6°, with 2.7 in69 mm of precipitation in a typical February.
- Record high
- 78°26° (2016)
- Record low
- 29°−2° (1949)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in March
Highs average 65°18° and lows 45°7°, with 2 in51 mm of precipitation in a typical March.
- Record high
- 88°31° (2026)
- Record low
- 29°−2° (1966)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in April
Highs average 69°21° and lows 48°9°, with 1.2 in30 mm of precipitation in a typical April.
- Record high
- 95°35° (2004)
- Record low
- 30°−1° (1964)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in May
Highs average 76°24° and lows 52°11°, with 0.4 in10 mm of precipitation in a typical May.
- Record high
- 101°38° (1950)
- Record low
- 34°1° (1965)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in June
Highs average 82°28° and lows 56°13°, with 0.3 in7.6 mm of precipitation in a typical June.
- Record high
- 110°43° (1961)
- Record low
- 44°7° (1966)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in July
Highs average 87°31° and lows 58°14°, with 0.2 in5.1 mm of precipitation in a typical July.
- Record high
- 109°43° (1970)
- Record low
- 38°3° (2014)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in August
Highs average 87°30° and lows 58°14°, with 0.1 in2.5 mm of precipitation in a typical August.
- Record high
- 108°42° (1950)
- Record low
- 50°10° (1955)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in September
Highs average 85°29° and lows 57°14°, with 0.3 in7.6 mm of precipitation in a typical September.
- Record high
- 110°43° (1955)
- Record low
- 45°7° (1964)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in OctoberThis month
Highs average 77°25° and lows 53°11°, with 0.8 in20 mm of precipitation in a typical October.
- Record high
- 101°38° (1952)
- Record low
- 36°2° (1970)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in November
Highs average 64°18° and lows 45°7°, with 1.9 in48 mm of precipitation in a typical November.
- Record high
- 89°32° (1967)
- Record low
- 26°−3° (1964)
- Heating degree days
- —
- Cooling degree days
- —
Rio Vista in December
Highs average 54°12° and lows 40°5°, with 3.2 in81 mm of precipitation in a typical December.
- Record high
- 76°24° (1958)
- Record low
- 22°−6° (1965)
- Heating degree days
- —
- Cooling degree days
- —
Lodi station, 1893–2015: records and averages
This station is no longer reporting, but its 1893–2015 record is the longest and most local history available. These are its own averages over its own period of record — not NCEI normals, and not the same station as the computed averages above.
January
Average high 54°12°, low 37°3°, 3.4 in86 mm precipitation.
Record high 76°24° (2014); record low 11°−12° (1949).
February
Average high 61°16°, low 40°4°, 2.9 in74 mm precipitation.
Record high 82°28° (1899); record low 18°−8° (1989).
March
Average high 66°19°, low 42°5°, 2.8 in71 mm precipitation.
Record high 87°31° (1966); record low 22°−6° (1971).
April
Average high 73°23°, low 45°7°, 1.3 in33 mm precipitation.
Record high 96°36° (1931); record low 28°−2° (1936).
May
Average high 80°26°, low 49°10°, 0.6 in15 mm precipitation.
Record high 104°40° (1910); record low 30°−1° (2007).
June
Average high 87°30°, low 53°12°, 0.2 in5.1 mm precipitation.
Record high 111°44° (1961); record low 35°2° (2006).
July
Average high 92°33°, low 56°13°, 0 in0 mm precipitation.
Record high 110°43° (1905); record low 39°4° (1935).
August
Average high 90°32°, low 54°12°, 0 in0 mm precipitation.
Record high 109°43° (1978); record low 40°4° (1933).
September
Average high 87°30°, low 52°11°, 0.3 in7.6 mm precipitation.
Record high 108°42° (1944); record low 34°1° (1948).
October
Average high 78°25°, low 47°8°, 0.9 in23 mm precipitation.
Record high 101°38° (1933); record low 25°−4° (1935).
November
Average high 65°18°, low 40°5°, 1.9 in48 mm precipitation.
Record high 87°31° (1976); record low 20°−7° (1935).
December
Average high 55°13°, low 37°3°, 3 in76 mm precipitation.
Record high 76°24° (1959); record low 13°−11° (1932).