Hamm, Germany Climate & Monthly Averages
Hamm has an oceanic climate. August is the hottest month, averaging 75° by day; January is the coldest at 42°.
How weather changes through the year in Hamm
Hamm records 158 wet days and 7.6 hours of daily sunshine in an average year. Temperatures follow an oceanic pattern, running 42°F (6°C) in January up to 75°F (24°C) in August.
Hamm climate quick facts
- Hottest month: August - highs near 75°F (24°C)
- Coldest month: January - highs near 42°F (6°C)
- Decade extremes (2015-2024): 100°F (38°C) high · -2°F (-19°C) low
- Wettest month: January (17 rainy days) · Sunniest: June (11.3 h sun/day)
- Climate type: oceanic
- Annual swing: 16°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 8 days a year
- Average humidity: 77%
Temperatures, rain and sunshine
Snow falls on roughly 8 days a year, mostly November through April. Warmth peaks in August: highs of 75°F (24°C), lows of 59°F (15°C). January is the coolest month, with highs of 42°F (6°C) and lows near 34°F (1°C). June is the brightest month at 11.3 hours of sun a day, against an annual average of 7.6 - duller than all but 9% of the 3496 cities in our dataset.
Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is May through June. Precipitation concentrates in January - 3.3 inches (84 mm) on 17 days - and thins out by April. The gridded 2015-2024 daily record for this location tops out at 100°F (38°C) and bottoms at -2°F (-19°C) - decade extremes, not all-time station records.
Where Hamm sits among other climates
- 28% of the year's precipitation falls in its wettest three months - more evenly spread than almost every other city we track.
These comparisons use the same ten-year window for every city in the dataset.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 42° | 34° | 17 | 3.3 in | 3.3 h/day | 8.3 h | 54% | 85% |
| February | 46° | 35° | 14 | 3.1 in | 5.2 h/day | 9.9 h | 48% | 81% |
| March | 51° | 37° | 13 | 2.6 in | 7.0 h/day | 11.7 h | 41% | 77% |
| April | 57° | 40° | 12 | 2.3 in | 9.5 h/day | 13.8 h | 40% | 71% |
| May | 65° | 48° | 12 | 2.4 in | 11.0 h/day | 15.6 h | 38% | 70% |
| June | 73° | 56° | 12 | 2.7 in | 11.3 h/day | 16.6 h | 39% | 69% |
| July | 74° | 58° | 13 | 3.0 in | 11.3 h/day | 16.2 h | 42% | 69% |
| August | 75° | 59° | 12 | 3.2 in | 10.7 h/day | 14.6 h | 40% | 71% |
| September | 68° | 53° | 11 | 2.5 in | 9.0 h/day | 12.6 h | 37% | 75% |
| October | 60° | 48° | 13 | 2.9 in | 5.8 h/day | 10.5 h | 43% | 81% |
| November | 49° | 40° | 14 | 2.9 in | 4.4 h/day | 8.7 h | 47% | 85% |
| December | 45° | 37° | 16 | 3.2 in | 2.8 h/day | 7.8 h | 51% | 87% |
Hamm month by month
Each card shows the average high and low. The bar places that month between Hamm's coldest night and warmest afternoon.
January
- Rain
- 17 days
- Sunshine
- 3.3 h
- Daylight
- 8.3 h
- Snow
- 3 days
February
- Rain
- 14 days
- Sunshine
- 5.2 h
- Daylight
- 9.9 h
- Snow
- 1 day
March
- Rain
- 13 days
- Sunshine
- 7.0 h
- Daylight
- 11.7 h
April
- Rain
- 12 days
- Sunshine
- 9.5 h
- Daylight
- 13.8 h
May
- Rain
- 12 days
- Sunshine
- 11.0 h
- Daylight
- 15.6 h
June
- Rain
- 12 days
- Sunshine
- 11.3 h
- Daylight
- 16.6 h
July
- Rain
- 13 days
- Sunshine
- 11.3 h
- Daylight
- 16.2 h
August
- Rain
- 12 days
- Sunshine
- 10.7 h
- Daylight
- 14.6 h
September
- Rain
- 11 days
- Sunshine
- 9.0 h
- Daylight
- 12.6 h
October
- Rain
- 13 days
- Sunshine
- 5.8 h
- Daylight
- 10.5 h
November
- Rain
- 14 days
- Sunshine
- 4.4 h
- Daylight
- 8.7 h
December
- Rain
- 16 days
- Sunshine
- 2.8 h
- Daylight
- 7.8 h
- Snow
- 1 day
Looking for warmer alternatives? Browse warm places by month, or compare Hamm's coolest part of the year: January, December, February.
A season-by-season guide to Hamm
Spring (March through May)
Through spring, Hamm runs cool rather than cold: 58°F (14°C) by day, 42°F (5°C) after dark, and rain falls on around 36 of the 90 days.
Summer (June through August)
Summer settles into easy warmth here - highs near 74°F (23°C), nights near 58°F (14°C), and rain falls on around 37 of the 90 days. Daylight is generous - around 11.1 hours of sun a day.
Fall (September through November)
Through fall, Hamm stays on the cool side of mild: 59°F (15°C) by day, 47°F (8°C) after dark, and rain falls on around 38 of the 90 days.
Winter (December through February)
Through winter, Hamm stays firmly cold: 44°F (7°C) by day, 35°F (2°C) after dark, and rain falls on around 46 of the 90 days, plus about 6 snowy days.
Questions people ask about Hamm's climate
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The most useful weather window for Hamm
Best time to visit Hamm
Aim for April to June and September if you get the choice: warm days, manageable rainfall and plenty of daylight line up, and highs average 66°F (19°C) against roughly 12 wet days a month. For the same question asked the other way round, see where else is warm in April.
What to pack
Pack for Hamm with a warm jacket and layers for the cooler season and proper waterproofs rather than an umbrella - wet days are the norm here. Note the gap between afternoon and night: August pairs 75°F (24°C) with 59°F (15°C).
Hamm temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.