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Jena, Thuringia Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Jena, Thuringia?
Jena, Thuringia gets 595 mm of precipitation a year over about 160 rainy days. July is the warmest month (average high 26°C) and January the coldest (average low -1°C).
Oceanic climate
Jena, Thuringia has warm summers and chilly winters. Daytime highs range from about 5°C in January to 26°C in July. July is usually the wettest month. The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 23°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -1° | 6° |
| Spring | Mar–May | 5° | 16° |
| Summer | Jun–Aug | 13° | 25° |
| Autumn | Sep–Nov | 6° | 15° |
How much rain does Jena get?
Jena gets 595 mm of precipitation in an average year, spread over about 160 days with measurable rain. That is fewer rainy days than 71% of Germany.
July is the wettest month, with 85 mm. February is the driest, with 30 mm. December has the most rainy days, about 16.
The longest dry spell in the last five years lasted 20 days, to May 15, 2022.
From October 2025 to September 2026 Jena got 534 mm of rain, against a normal of 595 mm for those months. May 2026 had the most, with 152 mm.
Jena weather by month
Jena weather in January
In January, Jena averages a high of 4°C and a low of -1°C. It gets 35 mm of precipitation over about 15 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The January record high is 17°C (2023) and the record low is -23°C (1987).
Jena weather in February
In February, Jena averages a high of 6°C and a low of -1°C. It gets 30 mm of precipitation over about 13 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The February record high is 22°C (2021) and the record low is -21°C (1985).
Jena weather in March
In March, Jena averages a high of 11°C and a low of 2°C. It gets 42 mm of precipitation over about 15 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 26°C (1989) and the record low is -21°C (1987).
Jena weather in April
In April, Jena averages a high of 16°C and a low of 4°C. It gets 37 mm of precipitation over about 11 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The April record high is 32°C (2012) and the record low is -7°C (1986).
Jena weather in May
In May, Jena averages a high of 21°C and a low of 8°C. It gets 61 mm of precipitation over about 13 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The May record high is 35°C (2005) and the record low is -1°C (1979). May is one of the most comfortable months to visit.
Jena weather in June
In June, Jena averages a high of 24°C and a low of 12°C. It gets 55 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The June record high is 39°C (2026) and the record low is 1°C (1977). June is one of the most comfortable months to visit.
Jena weather in July
In July, Jena averages a high of 26°C and a low of 14°C. It gets 85 mm of precipitation over about 14 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The July record high is 39°C (2015) and the record low is 5°C (1979).
Jena weather in August
In August, Jena averages a high of 26°C and a low of 13°C. It gets 68 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The August record high is 39°C (2015) and the record low is 4°C (1980). August is one of the most comfortable months to visit.
Jena weather in September
In September, Jena averages a high of 21°C and a low of 10°C. It gets 51 mm of precipitation over about 12 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The September record high is 34°C (2024) and the record low is 1°C (2008). September is one of the most comfortable months to visit.
Jena weather in October
In October, Jena averages a high of 15°C and a low of 6°C. It gets 41 mm of precipitation over about 13 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The October record high is 29°C (1985) and the record low is -6°C (1997).
Jena weather in November
In November, Jena averages a high of 9°C and a low of 3°C. It gets 47 mm of precipitation over about 14 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The November record high is 21°C (2020) and the record low is -12°C (1993).
Jena weather in December
In December, Jena averages a high of 6°C and a low of 0°C. It gets 43 mm of precipitation over about 16 rainy days. Estimated sunshine is 18% of daylight hours, derived from ERA5 cloud cover. The December record high is 18°C (2022) and the record low is -21°C (1996).
Sunshine, humidity and wind in Jena
September is the sunniest month in Jena, with estimated sunshine of 42% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 18%. The annual cloud-cover estimate is 32% of daylight hours; it is not a measurement of sunshine duration. Jena is cloudier than 51% of Germany.
Humidity peaks in December at 85% and is lowest in July at 59%.
Jena has about 7 days a year above 32°C. Jena is hotter than 92% of Germany.
First and last freeze in Jena
The first fall freeze in Jena typically comes around October 25, and the last spring freeze around April 18. That leaves a frost-free growing season of about 190 days.
Jena weather records
These records cover JENA STERNWARTE during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Jena station is 39°C, on June 27, 2026. The coldest is -23°C, on January 14, 1987.
The wettest day in the available station history brought 110 mm of precipitation, on July 18, 1997.
45 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.4°C per decade since 1970.
The best time to visit Jena
The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 23°C.
Winter (December–February) is chilly, with average highs around 5°C and lows near -1°C.
Spring (March–May) is mild, with average highs around 16°C and lows near 5°C.
Summer (June–August) is warm, with average highs around 25°C and lows near 13°C.
Autumn (September–November) is mild, with average highs around 15°C and lows near 6°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -1° | 4° | 35 mm | 15 | 82% | 21% | 17° | -23° |
| February | -1° | 6° | 30 mm | 13 | 78% | 24% | 22° | -21° |
| March | 2° | 11° | 42 mm | 15 | 70% | 37% | 26° | -21° |
| April | 4° | 16° | 37 mm | 11 | 65% | 36% | 32° | -7° |
| May | 8° | 21° | 61 mm | 13 | 65% | 37% | 35° | -1° |
| June | 12° | 24° | 55 mm | 13 | 63% | 38% | 39° | 1° |
| July | 14° | 26° | 85 mm | 14 | 59% | 39% | 39° | 5° |
| August | 13° | 26° | 68 mm | 13 | 64% | 38% | 39° | 4° |
| September | 10° | 21° | 51 mm | 12 | 70% | 42% | 34° | 1° |
| October | 6° | 15° | 41 mm | 13 | 79% | 27% | 29° | -6° |
| November | 3° | 9° | 47 mm | 14 | 83% | 24% | 21° | -12° |
| December | 0° | 6° | 43 mm | 16 | 85% | 18% | 18° | -21° |
Station: JENA STERNWARTE, 1 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Jena climate questions
How much rain does Jena get?
Jena gets 595 mm of precipitation in an average year, over about 160 rainy days.
What is the wettest month in Jena?
July is the wettest month in Jena, with 85 mm. February is the driest, with 30 mm.
How many rainy days does Jena have a year?
Jena has about 160 days with measurable rain in an average year. December has the most, about 16.
What is the hottest month in Jena?
July is the warmest month in Jena, with an average high of 26°C.
What is the coldest month in Jena?
January is the coldest month in Jena, with an average low of -1°C.
What is the record high temperature in Jena?
Within the available 1970–2026 station history, the record high at the Jena station is 39°C, set on June 27, 2026. The record low is -23°C, on January 14, 1987.
What is the sunniest month in Jena?
September is the sunniest month in Jena, with estimated sunshine of 42% of daylight hours from ERA5 cloud cover. December is the cloudiest.
When is the first frost in Jena?
The first fall freeze in Jena typically comes around October 25. The last spring freeze is around April 18.
What is the best time to visit Jena?
The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 23°C.