Waltham Weather Year-Round — Best Time to Visit
Waltham, United States has cool weather year-round. The best time to visit is August (score: 84/100). Annual average high: 14.9°C, total rainfall: 1083mm.
When is the best time to visit Waltham?
84
August is the best month to visit Waltham with a travel score of 84/100 (Excellent).
Expect highs of 27°C, 10 rain days, and 10.6 hours of daily sunshine.
View August weather details →Travel Score by Month
45
Jan
51
Feb
55
Mar
65
Apr
74
May
82
Jun
83
Jul
84
Aug
81
Sep
68
Oct
59
Nov
48
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Waltham each month?
14.9°C
Avg High
6.1°C
Avg Low
1083mm
Annual Rain
How much rain does Waltham get?
Waltham receives 1083mm of rain annually. The wettest month is typically March with 105mm, while February is the driest.
What is the weather like each month in Waltham?
January
45
2°C
Low: -7°C
9 rain days
Mixed
February
51
3°C
Low: -6°C
8 rain days
Mixed
March
55
7°C
Low: -2°C
10 rain days
Mixed
April
65
14°C
Low: 4°C
10 rain days
Good
May
74
19°C
Low: 10°C
10 rain days
Good
June
82
25°C
Low: 15°C
11 rain days
Excellent
July
83
28°C
Low: 19°C
11 rain days
Excellent
August
Best time to visit84
27°C
Low: 18°C
10 rain days
Excellent
September
81
23°C
Low: 14°C
8 rain days
Excellent
October
68
16°C
Low: 8°C
9 rain days
Good
November
59
10°C
Low: 3°C
8 rain days
Mixed
December
48
5°C
Low: -3°C
10 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31