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Climate guideThirty-year normals for Hamm
Hamm climate by month
Oceanic · CfbBest May–Jun · Sep
Annual mean11°day and night
Seasonal swing16°warmest vs coolest
Precipitation871 mm160 wet days a year
51.68° N, 7.82° EElevation 66 mUTC+2 · Central European Summer Time
When to goHamm · weather score
Best timeMay–Jun · Sep
October: high / low15° / 7°
iSummary
What the weather is like
Hamm has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is July, when afternoons average 25° and nights 13°. January is the coolest month, with highs of 6° and lows of 0°. The difference between the warmest and the coolest month is about 16°.
About 871 mm of precipitation falls in an average year. January is the wettest month (79 mm, 16 wet days) and April the driest (49 mm, 10 wet days). Cloud cover ranges from 37% in August to 56% in December.
Compared with Berlin, the capital, Hamm is 0.6° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 25° · July
- Coldest nights
- 0° · January
- Wettest month
- January
- Driest month
- April
- Clearest skies
- August · 37% cloud
- Longest day
- 16 h 38 min
- Shortest day
- 7 h 50 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 6° | 7° | 11° | 16° | 19° | 22° | 25° | 24° | 20° | 15° | 10° | 6° |
| Average low | 0° | 0° | 2° | 4° | 8° | 11° | 13° | 13° | 10° | 7° | 4° | 1° |
| Precipitation | 79 mm | 60 mm | 74 mm | 49 mm | 68 mm | 78 mm | 80 mm | 78 mm | 77 mm | 73 mm | 77 mm | 78 mm |
| Wet days (≥1 mm) | 15.9 | 12.2 | 12.5 | 10.2 | 12.7 | 13.2 | 15 | 14.9 | 11.6 | 12.8 | 14 | 15.4 |
| Cloud cover | 54% | 50% | 48% | 43% | 41% | 41% | 38% | 37% | 43% | 47% | 53% | 56% |
| Daylight | 8h 19 | 9h 59 | 11h 48 | 13h 51 | 15h 37 | 16h 38 | 16h 13 | 14h 40 | 12h 42 | 10h 44 | 8h 53 | 7h 50 |
| Month score | 15 | 21 | 24 | 58 | 65 | 64 | 64 | 64 | 67 | 48 | 15 | 14 |
ivMonth by month
Hamm in every month
January15
6° / 0°
79 mm · 15.9 wet days
February21
7° / 0°
60 mm · 12.2 wet days
March24
11° / 2°
74 mm · 12.5 wet days
April58
16° / 4°
49 mm · 10.2 wet days
May65
19° / 8°
68 mm · 12.7 wet days
June64
22° / 11°
78 mm · 13.2 wet days
July64
25° / 13°
80 mm · 15 wet days
August64
24° / 13°
78 mm · 14.9 wet days
September67
20° / 10°
77 mm · 11.6 wet days
October48
15° / 7°
73 mm · 12.8 wet days
November15
10° / 4°
77 mm · 14 wet days
December14
6° / 1°
78 mm · 15.4 wet days