Twin Falls, Idaho - Climate

Climate

Twin Falls experiences a semi-arid climate.

Monthly temperature averages in Twin Falls range from 34.9 °F (1.6 °C) in January to 85.0 °F (29.4 °C) in July, with lows below freezing from December through March. Highs reach 90 °F (32.2 °C) on average 18.8 days per year, but very rarely exceed 100 °F (37.8 °C). Winter snowfall averages 29.5 inches (74.9 cm) per year, though much heavier amounts have fallen. However, in Twin Falls proper after an average snowfall it is uncommon to see more than six inches of snow on streets and sidewalks. Summer and autumn months are very dry in Twin Falls, with less than 1 inch (2.5 cm) inch of precipitation falling each month between June and October. It is not uncommon to experience fast moving, intense electrical storms common in the deserts of the southwestern portion of the USA.

Climate data for Twin Falls, Idaho
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °F (°C) 34.9
(1.6)
41.4
(5.2)
50.7
(10.4)
59.5
(15.3)
67.7
(19.8)
77.0
(25.0)
85.0
(29.4)
84.1
(28.9)
74.2
(23.4)
62.5
(16.9)
46.2
(7.9)
36.4
(2.4)
59.97
(15.54)
Average low °F (°C) 19.2
(−7.1)
23.4
(−4.8)
28.8
(−1.8)
33.7
(0.9)
41.2
(5.1)
48.0
(8.9)
52.8
(11.6)
51.1
(10.6)
42.8
(6.0)
34.2
(1.2)
26.4
(−3.1)
19.3
(−7.1)
49.7
(9.8)
Precipitation inches (mm) 1.29
(32.8)
0.93
(23.6)
1.21
(30.7)
0.95
(24.1)
1.40
(35.6)
0.84
(21.3)
0.27
(6.9)
0.38
(9.7)
0.65
(16.5)
0.78
(19.8)
1.17
(29.7)
1.12
(28.4)
10.99
(279.1)
Snowfall inches (cm) 7.4
(18.8)
5.4
(13.7)
3.5
(8.9)
1.1
(2.8)
0.7
(1.8)
0
(0)
0
(0)
0
(0)
0.1
(0.3)
0.3
(0.8)
4.1
(10.4)
6.9
(17.5)
29.5
(74.9)
Avg. precipitation days (≥ 0.01 in) 10.2 8.6 9.9 8.6 9.0 6.4 3.3 3.6 4.2 5.8 9.3 9.3 88.2
Avg. snowy days (≥ 0.1 in) 6.8 4.3 3.4 1.4 0.5 0.2 0 0 0.1 0.4 3.5 5.4 26
Source: NOAA,

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