Hamm climate
Hamm (North Rhine-Westphalia, Germany) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 10 °C51 °F, and about 844 mm33 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Hamm climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 439 | −130 | 135 | 853.3 | 19 |
| Feb | 541 | −130 | 236 | 632.5 | 18 |
| Mar | 949 | 134 | 541 | 612.4 | 14 |
| Apr | 1558 | 540 | 1049 | 471.9 | 5 |
| May | 1965 | 947 | 1456 | 702.8 | 0 |
| Jun | 2272 | 1254 | 1763 | 702.8 | 0 |
| Jul | 2577 | 1458 | 2067 | 833.3 | 0 |
| Aug | 2476 | 1457 | 1967 | 793.1 | 0 |
| Sep | 2068 | 1051 | 1560 | 652.6 | 0 |
| Oct | 1558 | 744 | 1151 | 642.5 | 2 |
| Nov | 948 | 338 | 643 | 753.0 | 7 |
| Dec | 541 | 033 | 337 | 823.2 | 16 |
| Year | 2577 | −130 | 1051 | 84433 | 81 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 94% | 77% | 0.8 | 8:17 |
| Feb | 91% | 74% | 1.4 | 9:52 |
| Mar | 87% | 69% | 2.7 | 11:42 |
| Apr | 81% | 64% | 4.2 | 13:48 |
| May | 79% | 68% | 5.0 | 15:37 |
| Jun | 76% | 71% | 5.4 | 16:38 |
| Jul | 71% | 68% | 5.2 | 16:13 |
| Aug | 71% | 67% | 4.3 | 14:36 |
| Sep | 76% | 65% | 3.2 | 12:33 |
| Oct | 85% | 70% | 1.9 | 10:32 |
| Nov | 92% | 76% | 0.9 | 8:44 |
| Dec | 94% | 78% | 0.6 | 7:49 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Hamm is like
The warmest month is July, with an average high of 25 °C77 °F and a low of 14 °C58 °F. The coldest is January, when highs average 4 °C39 °F and lows −1 °C30 °F. Seasons are strongly marked: the warmest month is on average 18.1 °C32.6 °F warmer than the coldest.
Annual precipitation is moderate at about 844 mm33 in. Rain is spread fairly evenly through the year. The wettest month is January (85 mm3.3 in), the driest is April (47 mm1.9 in).
Relative humidity ranges from 71% in July to 94% in December. The clearest skies (lowest average cloud amount, 64%) are typical of April. Average wind speed near the ground ranges from 9 km/h (6 mph) in June to 14 km/h (9 mph) in January. Daylight lasts from about 7.8 hours in December to 16.6 hours in June.
A lasting snow cover is typical in December–February. In those months the average snow depth in the reanalysis exceeds 10 cm. It is deepest in January, at about 13 cm.
Best time to visit Hamm
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September. Average highs then reach 20 °C68 °F to 25 °C77 °F. Precipitation is 65 mm2.6 in to 83 mm3.3 in per month.
The most challenging month is January, which is cold, with average highs of 4 °C39 °F.
Comfort score: months are ranked by how close they come to an ideal. That means an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Hamm
- Winter (December–February) — highs 439 to 5 °C41 °F, lows −130 to 0 °C33 °F, about 76 mm3.0 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 949 to 19 °C65 °F, lows 134 to 9 °C47 °F, about 59 mm2.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2272 to 25 °C77 °F, lows 1254 to 14 °C58 °F, about 77 mm3.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 948 to 20 °C68 °F, lows 338 to 10 °C51 °F, about 68 mm2.7 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Hamm compares
The nearest larger place is Dortmund, about 31 km to the southwest. Compared with it, Hamm has practically the same average temperature. It receives a similar amount of precipitation.
World Climates covers 62 places in Germany. By annual mean temperature, Hamm is the 19th warmest of them. By annual precipitation, it is the 9th wettest. See all of them on the Germany climate page.
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are Liège (Belgium, Cfb), Metz (France, Cfb) and Maastricht (The Netherlands, Cfb).
Nearby places
- Climate in Dortmund 31 km · 10 °C50 °F · 884 mm35 in
- Climate in Münster 34 km · 10 °C50 °F · 770 mm30 in
- Climate in Essen 61 km · 10 °C50 °F · 843 mm33 in
- Climate in Bielefeld 63 km · 10 °C49 °F · 795 mm31 in
- Climate in Paderborn 64 km · 10 °C50 °F · 796 mm31 in
- Climate in Osnabrück 68 km · 10 °C49 °F · 724 mm29 in
- Climate in Remscheid 71 km · 9 °C47 °F · 905 mm36 in
- Climate in Solingen 76 km · 9 °C49 °F · 791 mm31 in
Frequently asked questions
What is the warmest month in Hamm?
July is the warmest month in Hamm. Its average high is 25 °C (77 °F) and its average low is 14 °C (58 °F).
What is the coldest month in Hamm?
January is the coldest month. Its average high is 4 °C (39 °F) and its average low is -1 °C (30 °F).
When does it rain the most in Hamm?
January is the wettest month with about 85 mm (3.3 in) of precipitation. April is the driest with about 47 mm (1.9 in).
What is the best time to visit Hamm?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station. So they can differ from airport records. The gaps are largest on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 236 m, while Hamm lies at about 66 m. Temperatures on this page were therefore adjusted by +1.1 °C2 °F using the standard lapse rate of 6.5 °C per 1,000 m.