Annual mean 17°C · wettest around January · prevailing wind W
Warmest
27.7 °C
Coldest
17.1 °C
Wettest
36%
Windiest
4.2 m/s
Prevailing
W
3.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 National City over the whole year is 17°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about 9°C. The rainy (wet) season in National City runs from November to May, peaking in January with a 36% chance of rain on a given day. The dry season is June to August; July is the driest month, at 3%. Winds in National City are highest in May, averaging 2.6 m/s (9 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the W. The clearest skies in National City come in November, when the sky is typically 30% covered; May is the cloudiest month, at 63%.
Month by month National City 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
18°C
9°C
15°C
36%
38%
2.1 m/s
52
1
87
February
18°C
9°C
15°C
35%
39%
2.4 m/s
51
3
82
March
18°C
10°C
15°C
35%
50%
2.4 m/s
55
2
87
April
20°C
12°C
17°C
24%
48%
2.5 m/s
73
6
85
May
20°C
14°C
18°C
27%
63%
2.6 m/s
82
6
86
June
23°C
16°C
21°C
10%
53%
2.5 m/s
87
21
68
July
26°C
19°C
25°C
3%
41%
2.4 m/s
75
49
38
August
27°C
19°C
26°C
14%
37%
2.3 m/s
66
61
26
September
26°C
18°C
25°C
26%
40%
2.2 m/s
72
47
37
October
25°C
15°C
23°C
18%
34%
2.0 m/s
84
28
60
November
22°C
11°C
19°C
32%
30%
1.9 m/s
81
10
80
December
19°C
9°C
15°C
32%
36%
1.9 m/s
62
1
87
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 National City weather by season
Year round, National City has days of about 18°C at their warmest in January, its coolest month, and 27°C in August, its warmest; the coolest hours of the day run from 9°C to 19°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around January 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.
National City weather in winterDecember to February
High 18°CLow 9°CRain 35%
Winter in National City has typical daily highs of about 18°C and lows of about 9°C, with a 35% chance of rain on a given day.
National City weather in springMarch to May
High 19°CLow 12°CRain 29%
Spring in National City has typical daily highs of about 19°C and lows of about 12°C, with a 29% chance of rain on a given day.
National City weather in summerJune to August
High 25°CLow 18°CRain 9%
Summer in National City has typical daily highs of about 25°C and lows of about 18°C, with a 9% chance of rain on a given day.
National City weather in autumnSeptember to November
High 24°CLow 15°CRain 25%
Autumn in National City has typical daily highs of about 24°C and lows of about 15°C, with a 25% chance of rain on a given day.
When is the rainy season in National City?
The rainy (wet) season in National City runs from November to May, peaking in January with a 36% chance of rain on a given day. The dry season is June to August; July is the driest month, at 3%.
What time of year is National City windiest?
Winds in National City are highest in May, averaging 2.6 m/s (9 km/h), and lightest in November, at 1.9 m/s (7 km/h). The prevailing wind is from the W.
What is the average temperature in National City year round?
The average temperature in National City over the whole year is 17°C. August is the hottest month, with highs of about 27°C; January is the coldest, with lows of about 9°C.