Gaithersburg Weather Year-Round — Best Time to Visit
Gaithersburg, United States has mild weather year-round. The best time to visit is September (score: 84/100). Annual average high: 17.8°C, total rainfall: 1106mm.
When is the best time to visit Gaithersburg?
84
September is the best month to visit Gaithersburg with a travel score of 84/100 (Excellent).
Expect highs of 25°C, 9 rain days, and 9.2 hours of daily sunshine.
View September weather details →Travel Score by Month
53
Jan
57
Feb
63
Mar
73
Apr
79
May
83
Jun
83
Jul
83
Aug
84
Sep
75
Oct
65
Nov
55
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Gaithersburg each month?
17.8°C
Avg High
8.4°C
Avg Low
1106mm
Annual Rain
How much rain does Gaithersburg get?
Gaithersburg receives 1106mm of rain annually. The wettest month is typically September with 120mm, while November is the driest.
What is the weather like each month in Gaithersburg?
January
53
5°C
Low: -3°C
8 rain days
Mixed
February
57
7°C
Low: -2°C
9 rain days
Mixed
March
63
12°C
Low: 1°C
9 rain days
Good
April
73
18°C
Low: 7°C
10 rain days
Good
May
79
23°C
Low: 12°C
12 rain days
Good
June
83
28°C
Low: 18°C
11 rain days
Excellent
July
83
30°C
Low: 20°C
11 rain days
Excellent
August
83
29°C
Low: 20°C
11 rain days
Excellent
September
Best time to visit84
25°C
Low: 16°C
9 rain days
Excellent
October
75
19°C
Low: 10°C
7 rain days
Good
November
65
12°C
Low: 4°C
7 rain days
Good
December
55
7°C
Low: 0°C
8 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31