Annual mean 14°C · wettest around May · prevailing wind W
Warmest
30.5 °C
Coldest
3.8 °C
Wettest
64%
Windiest
4.6 m/s
Prevailing
W
3.5 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 Gaithersburg over the whole year is 14°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -1°C. Gaithersburg has no sharply defined rainy season: the chance of rain on a given day runs from 56% in October, the driest month, to 62% in May, the wettest. Winds in Gaithersburg are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 1.8 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Gaithersburg come in July, when the sky is typically 39% covered; May is the cloudiest month, at 55%.
Month by month Gaithersburg 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
4°C
-1°C
-1°C
58%
52%
2.9 m/s
2
0
13
February
7°C
2°C
2°C
62%
48%
2.8 m/s
5
0
24
March
11°C
4°C
6°C
59%
46%
3.3 m/s
15
0
43
April
17°C
9°C
13°C
59%
48%
3.0 m/s
38
7
60
May
21°C
14°C
20°C
62%
55%
2.4 m/s
58
22
57
June
27°C
19°C
27°C
57%
42%
2.3 m/s
50
48
25
July
30°C
22°C
31°C
58%
39%
1.9 m/s
17
53
4
August
28°C
21°C
29°C
61%
43%
1.8 m/s
34
56
10
September
24°C
17°C
24°C
61%
45%
1.9 m/s
62
40
37
October
19°C
11°C
17°C
56%
45%
2.1 m/s
55
13
67
November
12°C
5°C
8°C
59%
40%
2.4 m/s
17
1
49
December
6°C
2°C
2°C
61%
51%
2.4 m/s
1
0
23
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 Gaithersburg weather by season
Year round, Gaithersburg has days of about 4°C at their warmest in January, its coolest month, and 30°C in July, its warmest; the coolest hours of the day run from -1°C to 22°C through the year, and the average temperature over the year is 14°C around the clock. Rain is most likely around May and least likely around October. 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.
Gaithersburg weather in winterDecember to February
High 6°CLow 1°CRain 60%
Winter in Gaithersburg has typical daily highs of about 6°C and lows of about 1°C, with a 60% chance of rain on a given day.
Gaithersburg weather in springMarch to May
High 16°CLow 9°CRain 60%
Spring in Gaithersburg has typical daily highs of about 16°C and lows of about 9°C, with a 60% chance of rain on a given day.
Gaithersburg weather in summerJune to August
High 28°CLow 21°CRain 59%
Summer in Gaithersburg has typical daily highs of about 28°C and lows of about 21°C, with a 59% chance of rain on a given day.
Gaithersburg weather in autumnSeptember to November
High 18°CLow 11°CRain 58%
Autumn in Gaithersburg has typical daily highs of about 18°C and lows of about 11°C, with a 58% chance of rain on a given day.
When is the rainy season in Gaithersburg?
Gaithersburg has no sharply defined rainy season: the chance of rain on a given day runs from 56% in October, the driest month, to 62% in May, the wettest.
What time of year is Gaithersburg windiest?
Winds in Gaithersburg are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 1.8 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Gaithersburg year round?
The average temperature in Gaithersburg over the whole year is 14°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -1°C.