Climate Insights for Hamburg

Walla Walla County, Iowa, United States

Hottest
June
31°C peak
Coldest
January
-7°C low
Wettest
May
152mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Hamburg is temperate. The average annual temperature is 12°C and approximately 1048mm of precipitation falls per year. Hamburg receives a notable amount of rainfall throughout the year, including during its driest month. Hamburg is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: June, July, August. The coldest months are January, December, February, when temperatures can drop to -7°C. Snowfall occurs from January to December, with around 68cm accumulating over the season.

Temperature

-10° 10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 2° Average: -3° Min: -7° Feb Max: 6° Average: 0° Min: -5° Mar Max: 13° Average: 6° Min: 2° Apr Max: 19° Average: 12° Min: 6° May Max: 24° Average: 18° Min: 13° Jun Max: 31° Average: 25° Min: 20° Jul Max: 31° Average: 26° Min: 21° Aug Max: 29° Average: 24° Min: 19° Sep Max: 27° Average: 21° Min: 16° Oct Max: 19° Average: 12° Min: 7° Nov Max: 12° Average: 6° Min: 1° Dec Max: 5° Average: -1° Min: -5°
Max
Average
Min

Hamburg has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is June, when average highs reach 31°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -3°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 35mm Snow: 19mm Feb Precipitation: 34mm Snow: 18mm Mar Precipitation: 82mm Snow: 6mm Apr Precipitation: 85mm Snow: 5mm May Precipitation: 152mm Snow: 0mm Jun Precipitation: 103mm Snow: 0mm Jul Precipitation: 113mm Snow: 0mm Aug Precipitation: 129mm Snow: 0mm Sep Precipitation: 112mm Snow: 0mm Oct Precipitation: 128mm Snow: 2mm Nov Precipitation: 35mm Snow: 6mm Dec Precipitation: 40mm Snow: 11mm
Precipitation
Snow

Hamburg is a moderately rainy area, receiving approximately 1048mm of precipitation annually, which averages out to around 87mm per month. The wettest month is May, averaging 152mm of rainfall. August and October also tend to see above-average precipitation. The driest month is February, with just 34mm. That's 118mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 68cm accumulating over the season. January typically sees the most snow at around 19cm.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 4km/h Feb Wind Speed: 4km/h Mar Wind Speed: 5km/h Apr Wind Speed: 5km/h May Wind Speed: 4km/h Jun Wind Speed: 4km/h Jul Wind Speed: 3km/h Aug Wind Speed: 3km/h Sep Wind Speed: 4km/h Oct Wind Speed: 4km/h Nov Wind Speed: 4km/h Dec Wind Speed: 4km/h
Wind Speed

Hamburg is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

7 days until Summer

It is currently spring in Hamburg, which began on March 20, 2026. Hamburg is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in June at around 31°C, while the coldest stretch bottoms out in January near -7°C. Summer is next, beginning on June 21, 2026 — 7 days from now.

Spring

Temperatures range from 2 to 24°C. Rainfall is heavy, totalling around 318mm across the season with a monthly average of 106mm. Winds are generally light, averaging 4km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 19 to 31°C. Rainfall is heavy, totalling around 345mm across the season with a monthly average of 115mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 1 to 27°C. Precipitation is moderate at around 275mm for the season, averaging 92mm per month. Expect around 8cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -7 to 6°C. Rainfall is relatively light, with around 109mm over the season and a monthly average of 36mm. Expect around 49cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Monthly Climate Data

The table below shows monthly climate averages for Hamburg based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-7 °C
2 °C
4 km/h
35 mm
19 cm
Feb
-5 °C
6 °C
4 km/h
34 mm
18 cm
Mar
2 °C
13 °C
5 km/h
82 mm
6 cm
Apr
6 °C
19 °C
5 km/h
85 mm
5 cm
May
13 °C
24 °C
4 km/h
152 mm
0 cm
Jun Current
20 °C
31 °C
4 km/h
103 mm
0 cm
Jul
21 °C
31 °C
3 km/h
113 mm
0 cm
Aug
19 °C
29 °C
3 km/h
129 mm
0 cm
Sep
16 °C
27 °C
4 km/h
112 mm
0 cm
Oct
7 °C
19 °C
4 km/h
128 mm
2 cm
Nov
1 °C
12 °C
4 km/h
35 mm
6 cm
Dec
-5 °C
5 °C
4 km/h
40 mm
11 cm
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