Tetonia weather by month
What a typical year looks like in Tetonia, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Driggs, 6 km from Tetonia; records cover 1904–2026.
The year at a glance
- Precipitation a year
- 19.4 in491 mm
- Snow a year
- Rare
- Last spring freeze
- Jun 13
- First fall freeze
- Sep 7
- Heating degree days
- 8,416
- Cooling degree days
- 119
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Tetonia in January
Highs average 33°0° and lows 9°−13°, with 2 in50 mm of precipitation in a typical January.
- Record high
- 60°16° (1974)
- Record low
- −44°−42° (1937)
- Heating degree days
- 1362
- Cooling degree days
- 0
Tetonia in February
Highs average 36°2° and lows 12°−11°, with 1.1 in27 mm of precipitation in a typical February.
- Record high
- 60°16° (1963)
- Record low
- −50°−46° (1933)
- Heating degree days
- 1144
- Cooling degree days
- 0
Tetonia in March
Highs average 44°7° and lows 20°−6°, with 1.4 in35 mm of precipitation in a typical March.
- Record high
- 72°22° (1926)
- Record low
- −30°−34° (1922)
- Heating degree days
- 1014
- Cooling degree days
- 0
Tetonia in April
Highs average 54°12° and lows 28°−2°, with 1.9 in48 mm of precipitation in a typical April.
- Record high
- 80°27° (1926)
- Record low
- −11°−24° (1926)
- Heating degree days
- 729
- Cooling degree days
- 0
Tetonia in May
Highs average 65°18° and lows 35°2°, with 2.3 in58 mm of precipitation in a typical May.
- Record high
- 89°32° (1914)
- Record low
- 8°−13° (1967)
- Heating degree days
- 469
- Cooling degree days
- 1
Tetonia in June
Highs average 73°23° and lows 41°5°, with 2 in50 mm of precipitation in a typical June.
- Record high
- 95°35° (1926)
- Record low
- 21°−6° (1937)
- Heating degree days
- 242
- Cooling degree days
- 8
Tetonia in July
Highs average 83°28° and lows 48°9°, with 1.1 in27 mm of precipitation in a typical July.
- Record high
- 100°38° (2021)
- Record low
- 25°−4° (1913)
- Heating degree days
- 58
- Cooling degree days
- 64
Tetonia in August
Highs average 82°28° and lows 46°8°, with 1.2 in31 mm of precipitation in a typical August.
- Record high
- 98°37° (1910)
- Record low
- 13°−11° (1910)
- Heating degree days
- 83
- Cooling degree days
- 42
Tetonia in September
Highs average 73°23° and lows 38°3°, with 1.5 in37 mm of precipitation in a typical September.
- Record high
- 96°36° (2022)
- Record low
- 9°−13° (1985)
- Heating degree days
- 291
- Cooling degree days
- 4
Tetonia in OctoberThis month
Highs average 58°15° and lows 29°−2°, with 1.8 in45 mm of precipitation in a typical October.
- Record high
- 85°29° (1920)
- Record low
- −7°−22° (1971)
- Heating degree days
- 670
- Cooling degree days
- 0
Tetonia in November
Highs average 44°7° and lows 19°−7°, with 1.5 in39 mm of precipitation in a typical November.
- Record high
- 71°22° (1930)
- Record low
- −25°−32° (1919)
- Heating degree days
- 1010
- Cooling degree days
- 0
Tetonia in December
Highs average 33°0° and lows 11°−12°, with 1.7 in44 mm of precipitation in a typical December.
- Record high
- 65°18° (1939)
- Record low
- −40° (1990)
- Heating degree days
- 1344
- Cooling degree days
- 0