Grenada weather by month
What a typical year looks like in Grenada, California: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Montague Siskiyou Airport, 16 km from Grenada; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 12 in305 mm
- Snow a year
- Rare
- Last spring freeze
- May 13
- First fall freeze
- Oct 1
- Heating degree days
- 5,126
- Cooling degree days
- 703
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 13°−11° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Grenada in January
Highs average 47°8° and lows 26°−3°, with 1.4 in36 mm of precipitation in a typical January.
- Record high
- 67°19° (2024)
- Record low
- −14°−26° (2017)
- Heating degree days
- 877
- Cooling degree days
- 0
Grenada in February
Highs average 53°11° and lows 27°−3°, with 1.4 in36 mm of precipitation in a typical February.
- Record high
- 72°22° (2022)
- Record low
- −13°−25° (1950)
- Heating degree days
- 706
- Cooling degree days
- 0
Grenada in March
Highs average 58°15° and lows 31°−1°, with 1.3 in32 mm of precipitation in a typical March.
- Record high
- 81°27° (2026)
- Record low
- 11°−12° (2008)
- Heating degree days
- 639
- Cooling degree days
- 0
Grenada in April
Highs average 64°18° and lows 34°1°, with 1.1 in27 mm of precipitation in a typical April.
- Record high
- 90°32° (2009)
- Record low
- 15°−9° (2001)
- Heating degree days
- 483
- Cooling degree days
- 0
Grenada in May
Highs average 74°23° and lows 41°5°, with 1.1 in27 mm of precipitation in a typical May.
- Record high
- 98°37° (2008)
- Record low
- 19°−7° (2008)
- Heating degree days
- 258
- Cooling degree days
- 16
Grenada in June
Highs average 83°28° and lows 47°8°, with 0.56 in14 mm of precipitation in a typical June.
- Record high
- 109°43° (2021)
- Record low
- 26°−3° (1952)
- Heating degree days
- 88
- Cooling degree days
- 85
Grenada in July
Highs average 93°34° and lows 55°13°, with 0.16 in4.1 mm of precipitation in a typical July.
- Record high
- 111°44° (2022)
- Record low
- 40°4° (2016)
- Heating degree days
- 4
- Cooling degree days
- 281
Grenada in August
Highs average 92°33° and lows 53°11°, with 0.34 in8.6 mm of precipitation in a typical August.
- Record high
- 107°42° (2017)
- Record low
- 37°3° (2008)
- Heating degree days
- 6
- Cooling degree days
- 235
Grenada in September
Highs average 84°29° and lows 45°7°, with 0.27 in6.9 mm of precipitation in a typical September.
- Record high
- 106°41° (2022)
- Record low
- 27°−3° (1950)
- Heating degree days
- 85
- Cooling degree days
- 82
Grenada in OctoberThis month
Highs average 70°21° and lows 36°2°, with 0.86 in22 mm of precipitation in a typical October.
- Record high
- 93°34° (2026)
- Record low
- 12°−11° (2002)
- Heating degree days
- 382
- Cooling degree days
- 4
Grenada in November
Highs average 54°12° and lows 30°−1°, with 1.3 in34 mm of precipitation in a typical November.
- Record high
- 77°25° (1949)
- Record low
- 8°−13° (2015)
- Heating degree days
- 693
- Cooling degree days
- 0
Grenada in December
Highs average 46°8° and lows 26°−3°, with 2.3 in57 mm of precipitation in a typical December.
- Record high
- 66°19° (1950)
- Record low
- −9°−23° (2013)
- Heating degree days
- 905
- Cooling degree days
- 0