Junction City weather by month
What a typical year looks like in Junction City, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Trinity River Hatchery, 25 km from Junction City; records cover 1974–2026.
The year at a glance
- Precipitation a year
- 32.4 in823 mm
- Snow a year
- 6 in16 cm
- Last spring freeze
- Apr 22
- First fall freeze
- Oct 16
- Heating degree days
- 4,033
- Cooling degree days
- 855
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 22°−6° (heating, 99%) and 105°41° (cooling, 1%).
Month by month
Junction City in January
Highs average 50°10° and lows 33°0°, with 6 in151 mm of precipitation and 1.2 in3 cm of snow in a typical January.
- Record high
- 70°21° (2022)
- Record low
- 12°−11° (2007)
- Heating degree days
- 733
- Cooling degree days
- 0
Junction City in February
Highs average 56°13° and lows 33°0°, with 4.7 in120 mm of precipitation and 1.6 in4.1 cm of snow in a typical February.
- Record high
- 81°27° (2022)
- Record low
- 10°−12° (1989)
- Heating degree days
- 575
- Cooling degree days
- 0
Junction City in March
Highs average 62°16° and lows 35°2°, with 4.1 in103 mm of precipitation and 0.3 in0.8 cm of snow in a typical March.
- Record high
- 86°30° (2024)
- Record low
- 20°−7° (1985)
- Heating degree days
- 513
- Cooling degree days
- 0
Junction City in April
Highs average 68°20° and lows 38°3°, with 2.6 in65 mm of precipitation in a typical April.
- Record high
- 94°34° (1981)
- Record low
- 23°−5° (1999)
- Heating degree days
- 371
- Cooling degree days
- 2
Junction City in May
Highs average 77°25° and lows 44°7°, with 1.7 in43 mm of precipitation in a typical May.
- Record high
- 103°39° (2025)
- Record low
- 27°−3° (1988)
- Heating degree days
- 175
- Cooling degree days
- 40
Junction City in June
Highs average 87°30° and lows 49°9°, with 0.86 in22 mm of precipitation in a typical June.
- Record high
- 111°44° (2021)
- Record low
- 33°1° (1982)
- Heating degree days
- 51
- Cooling degree days
- 128
Junction City in July
Highs average 96°35° and lows 54°12°, with 0.19 in4.8 mm of precipitation in a typical July.
- Record high
- 116°47° (2022)
- Record low
- 37°3° (1976)
- Heating degree days
- 3
- Cooling degree days
- 306
Junction City in August
Highs average 94°35° and lows 52°11°, with 0.14 in3.6 mm of precipitation in a typical August.
- Record high
- 113°45° (1981)
- Record low
- 38°3° (1999)
- Heating degree days
- 4
- Cooling degree days
- 256
Junction City in September
Highs average 89°32° and lows 46°8°, with 0.33 in8.4 mm of precipitation in a typical September.
- Record high
- 114°46° (2022)
- Record low
- 32°0° (1978)
- Heating degree days
- 45
- Cooling degree days
- 111
Junction City in OctoberThis month
Highs average 76°24° and lows 39°4°, with 1.9 in49 mm of precipitation in a typical October.
- Record high
- 102°39° (2024)
- Record low
- 20°−7° (2019)
- Heating degree days
- 256
- Cooling degree days
- 12
Junction City in November
Highs average 58°15° and lows 36°2°, with 3.5 in89 mm of precipitation and 0.6 in1.5 cm of snow in a typical November.
- Record high
- 83°28° (2020)
- Record low
- 15°−9° (1993)
- Heating degree days
- 540
- Cooling degree days
- 0
Junction City in December
Highs average 48°9° and lows 32°0°, with 6.5 in164 mm of precipitation and 2.7 in6.9 cm of snow in a typical December.
- Record high
- 67°19° (1976)
- Record low
- 4°−16° (1990)
- Heating degree days
- 767
- Cooling degree days
- 0