Arcadia weather by month
What a typical year looks like in Arcadia, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at LOS ANGELES DOWNTOWN, 20 km from Arcadia; records cover 1877–2026.
The year at a glance
- Precipitation a year
- 14.3 in362 mm
- Snow a year
- Rare
- Last spring freeze
- Rare
- First fall freeze
- Rare
- Heating degree days
- 1,005
- Cooling degree days
- 1,298
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 41°5° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Arcadia in January
Highs average 68°20° and lows 49°9°, with 3.3 in84 mm of precipitation in a typical January.
- Record high
- 95°35° (1971)
- Record low
- 28°−2° (1913)
- Heating degree days
- 211
- Cooling degree days
- 8
Arcadia in February
Highs average 68°20° and lows 50°10°, with 3.6 in92 mm of precipitation in a typical February.
- Record high
- 95°35° (1995)
- Record low
- 28°−2° (1883)
- Heating degree days
- 180
- Cooling degree days
- 12
Arcadia in March
Highs average 70°21° and lows 52°11°, with 2.2 in57 mm of precipitation in a typical March.
- Record high
- 99°37° (1879)
- Record low
- 31°−1° (1893)
- Heating degree days
- 141
- Cooling degree days
- 22
Arcadia in April
Highs average 72°22° and lows 55°13°, with 0.69 in18 mm of precipitation in a typical April.
- Record high
- 106°41° (1989)
- Record low
- 36°2° (1901)
- Heating degree days
- 87
- Cooling degree days
- 45
Arcadia in May
Highs average 74°23° and lows 58°15°, with 0.32 in8.1 mm of precipitation in a typical May.
- Record high
- 103°39° (1896)
- Record low
- 40°4° (1883)
- Heating degree days
- 39
- Cooling degree days
- 67
Arcadia in June
Highs average 77°25° and lows 61°16°, with 0.09 in2.3 mm of precipitation in a typical June.
- Record high
- 112°44° (1990)
- Record low
- 46°8° (1892)
- Heating degree days
- 4
- Cooling degree days
- 134
Arcadia in July
Highs average 82°28° and lows 65°18°, with 0.02 in0.5 mm of precipitation in a typical July.
- Record high
- 109°43° (1891)
- Record low
- 49°9° (1888)
- Heating degree days
- 0
- Cooling degree days
- 259
Arcadia in August
Highs average 84°29° and lows 65°19°, with 0 in0 mm of precipitation in a typical August.
- Record high
- 106°41° (1885)
- Record low
- 49°9° (1901)
- Heating degree days
- 0
- Cooling degree days
- 301
Arcadia in September
Highs average 83°28° and lows 64°18°, with 0.13 in3.3 mm of precipitation in a typical September.
- Record high
- 113°45° (2010)
- Record low
- 44°7° (1880)
- Heating degree days
- 1
- Cooling degree days
- 259
Arcadia in OctoberThis month
Highs average 79°26° and lows 60°16°, with 0.58 in15 mm of precipitation in a typical October.
- Record high
- 108°42° (1987)
- Record low
- 40°4° (1892)
- Heating degree days
- 15
- Cooling degree days
- 147
Arcadia in November
Highs average 73°23° and lows 53°12°, with 0.78 in20 mm of precipitation in a typical November.
- Record high
- 100°38° (1966)
- Record low
- 34°1° (1881)
- Heating degree days
- 100
- Cooling degree days
- 40
Arcadia in December
Highs average 67°20° and lows 48°9°, with 2.5 in63 mm of precipitation in a typical December.
- Record high
- 92°33° (1938)
- Record low
- 30°−1° (1878)
- Heating degree days
- 227
- Cooling degree days
- 4