Annual mean 11°C · wettest around December · prevailing wind W
Warmest
32.0 °C
Coldest
1.5 °C
Wettest
64%
Windiest
4.4 m/s
Prevailing
W
3.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Nampa over the whole year is 11°C. July is the hottest month, with highs of about 32°C; January is the coldest, with lows of about -2°C. The rainy (wet) season in Nampa runs from September to June, peaking in December with a 60% chance of rain on a given day. The dry season is July to August; July is the driest month, at 31%. Winds in Nampa are highest in April, averaging 3.3 m/s (12 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Nampa come in July, when the sky is typically 4% covered; December is the cloudiest month, at 59%.
Month by month Nampa climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
3°C
-2°C
-2°C
60%
54%
2.4 m/s
0
0
5
February
5°C
-2°C
0°C
60%
47%
2.8 m/s
0
0
13
March
11°C
2°C
6°C
60%
43%
3.2 m/s
5
0
42
April
15°C
5°C
10°C
59%
31%
3.3 m/s
24
1
64
May
20°C
11°C
16°C
57%
25%
3.2 m/s
57
11
68
June
26°C
16°C
22°C
59%
13%
3.1 m/s
64
38
48
July
32°C
19°C
29°C
31%
4%
2.5 m/s
37
70
13
August
30°C
17°C
27°C
35%
8%
2.3 m/s
50
65
21
September
24°C
11°C
21°C
54%
13%
2.2 m/s
69
28
58
October
16°C
5°C
13°C
54%
23%
2.2 m/s
38
1
71
November
8°C
1°C
4°C
59%
32%
2.3 m/s
4
0
32
December
2°C
-2°C
-2°C
60%
59%
2.2 m/s
0
0
5
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Nampa weather by season
Year round, Nampa has days of about 2°C at their warmest in December, its coolest month, and 32°C in July, its warmest; the coolest hours of the day run from -2°C to 19°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Nampa weather in winterDecember to February
High 3°CLow -2°CRain 60%
Winter in Nampa has typical daily highs of about 3°C and lows of about -2°C, with a 60% chance of rain on a given day.
Nampa weather in springMarch to May
High 15°CLow 6°CRain 58%
Spring in Nampa has typical daily highs of about 15°C and lows of about 6°C, with a 58% chance of rain on a given day.
Nampa weather in summerJune to August
High 29°CLow 17°CRain 42%
Summer in Nampa has typical daily highs of about 29°C and lows of about 17°C, with a 42% chance of rain on a given day.
Nampa weather in autumnSeptember to November
High 16°CLow 6°CRain 56%
Autumn in Nampa has typical daily highs of about 16°C and lows of about 6°C, with a 56% chance of rain on a given day.
When is the rainy season in Nampa?
The rainy (wet) season in Nampa runs from September to June, peaking in December with a 60% chance of rain on a given day. The dry season is July to August; July is the driest month, at 31%.
What time of year is Nampa windiest?
Winds in Nampa are highest in April, averaging 3.3 m/s (12 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Nampa year round?
The average temperature in Nampa over the whole year is 11°C. July is the hottest month, with highs of about 32°C; January is the coldest, with lows of about -2°C.