Kuna weather by month
What a typical year looks like in Kuna, Idaho: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Boise Air Terminal, 14 km from Kuna; records cover 1940–2026.
The year at a glance
- Precipitation a year
- 11.5 in292 mm
- Snow a year
- 18 in45 cm
- Last spring freeze
- May 1
- First fall freeze
- Oct 16
- Heating degree days
- 5,319
- Cooling degree days
- 1,044
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 9°−13° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Kuna in January
Highs average 39°4° and lows 26°−4°, with 1.4 in36 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 66°19° (2024)
- Record low
- −17°−27° (1950)
- Heating degree days
- 1018
- Cooling degree days
- 0
Kuna in February
Highs average 46°8° and lows 29°−2°, with 1 in25 mm of precipitation and 3 in8 cm of snow in a typical February.
- Record high
- 71°22° (1992)
- Record low
- −15°−26° (1989)
- Heating degree days
- 770
- Cooling degree days
- 0
Kuna in March
Highs average 56°13° and lows 35°2°, with 1.3 in34 mm of precipitation and 1.2 in3 cm of snow in a typical March.
- Record high
- 83°28° (2026)
- Record low
- 6°−14° (1971)
- Heating degree days
- 614
- Cooling degree days
- 0
Kuna in April
Highs average 62°17° and lows 40°4°, with 1.2 in31 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 92°33° (1946)
- Record low
- 19°−7° (1968)
- Heating degree days
- 424
- Cooling degree days
- 3
Kuna in May
Highs average 72°22° and lows 48°9°, with 1.5 in37 mm of precipitation in a typical May.
- Record high
- 100°38° (2025)
- Record low
- 22°−6° (1982)
- Heating degree days
- 200
- Cooling degree days
- 42
Kuna in June
Highs average 81°27° and lows 54°12°, with 0.75 in19 mm of precipitation in a typical June.
- Record high
- 110°43° (2015)
- Record low
- 31°−1° (1984)
- Heating degree days
- 61
- Cooling degree days
- 143
Kuna in July
Highs average 93°34° and lows 62°17°, with 0.21 in5.3 mm of precipitation in a typical July.
- Record high
- 111°44° (1960)
- Record low
- 35°2° (1986)
- Heating degree days
- 5
- Cooling degree days
- 386
Kuna in August
Highs average 91°33° and lows 61°16°, with 0.17 in4.3 mm of precipitation in a typical August.
- Record high
- 110°43° (1961)
- Record low
- 34°1° (1992)
- Heating degree days
- 8
- Cooling degree days
- 341
Kuna in September
Highs average 80°27° and lows 53°11°, with 0.43 in11 mm of precipitation in a typical September.
- Record high
- 104°40° (2022)
- Record low
- 23°−5° (1970)
- Heating degree days
- 80
- Cooling degree days
- 119
Kuna in OctoberThis month
Highs average 65°18° and lows 42°5°, with 0.81 in21 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 94°34° (1992)
- Record low
- 11°−12° (1971)
- Heating degree days
- 377
- Cooling degree days
- 10
Kuna in November
Highs average 49°9° and lows 32°0°, with 1.2 in30 mm of precipitation and 2 in5.1 cm of snow in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −3°−19° (1955)
- Heating degree days
- 742
- Cooling degree days
- 0
Kuna in December
Highs average 39°4° and lows 25°−4°, with 1.5 in39 mm of precipitation and 6 in14 cm of snow in a typical December.
- Record high
- 65°18° (1964)
- Record low
- −25°−32° (1990)
- Heating degree days
- 1020
- Cooling degree days
- 0