The best times to visit Heidelberg for ideal weather are
May 7th to October 14th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Heidelberg Travel Guide
Other Heidelberg Travel Info
Weather in Heidelberg
Temperature
Average temperatures in Heidelberg vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 64th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Heidelberg, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 78.9°F (26.1°C) with temperatures rarely dropping below 62.5°F (16.9°C) at night.
Heidelberg Temperatures (Fahrenheit)
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Heidelberg Temperatures (Celsius)
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“Feels-Like” Temperatures
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Heidelberg Perceived Temperature (F)
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Heidelberg Perceived Temperature (C)
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Average Heidelberg Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
Show Fahrenheit
Month | Avg. High (°F) | Avg. Mean (°F) | Avg. Low (°F) |
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Jan | 42.9 | 38.6 | 34 |
Feb | 47 | 41.1 | 35.8 |
Mar | 50.7 | 44.8 | 38.9 |
Apr | 62.9 | 55 | 46.1 |
May | 71.3 | 62.7 | 53.8 |
Jun | 73.2 | 65.7 | 57.5 |
Jul | 75.2 | 67.2 | 59.2 |
Aug | 76.5 | 68.3 | 59.9 |
Sep | 67.4 | 59.6 | 51.5 |
Oct | 58.5 | 51.8 | 45.6 |
Nov | 49.5 | 44.8 | 40 |
Dec | 40 | 36.7 | 33.3 |
Show Celsius
Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
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Jan | 6.1 | 3.7 | 1.1 |
Feb | 8.3 | 5.1 | 2.1 |
Mar | 10.4 | 7.1 | 3.8 |
Apr | 17.2 | 12.8 | 7.8 |
May | 21.8 | 17.1 | 12.1 |
Jun | 22.9 | 18.7 | 14.2 |
Jul | 24 | 19.6 | 15.1 |
Aug | 24.7 | 20.2 | 15.5 |
Sep | 19.7 | 15.3 | 10.8 |
Oct | 14.7 | 11 | 7.6 |
Nov | 9.7 | 7.1 | 4.4 |
Dec | 4.4 | 2.6 | 0.7 |
Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Heidelberg.
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Snow on the Ground
The graph below shows the average snow on the ground in Heidelberg (in).
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Average Rain and Snow by Month
Show Inches
Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
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Jan | 0% | 0 | 0 |
Feb | 0% | 0 | 0 |
Mar | 0% | 0 | 0 |
Apr | 0% | 0 | 0 |
May | 0% | 0 | 0 |
Jun | 0% | 0 | 0 |
Jul | 0% | 0 | 0 |
Aug | 0% | 0 | 0 |
Sep | 0% | 0 | 0 |
Oct | 0% | 0 | 0 |
Nov | 0% | 0 | 0 |
Dec | 0% | 0 | 0 |
Show Centimeters
Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
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Jan | 0 | 0 | 0 |
Feb | 0 | 0 | 0 |
Mar | 0 | 0 | 0 |
Apr | 0 | 0 | 0 |
May | 0 | 0 | 0 |
Jun | 0 | 0 | 0 |
Jul | 0 | 0 | 0 |
Aug | 0 | 0 | 0 |
Sep | 0 | 0 | 0 |
Oct | 0 | 0 | 0 |
Nov | 0 | 0 | 0 |
Dec | 0 | 0 | 0 |
Humidity and Wind
Heidelberg has some very humid months, with other moderately humid months on the other side of the year. The least humid month is April (48.5% relative humidity), and the most humid month is December (75.2%).
Wind in Heidelberg is usually calm. The windiest month is March, followed by January and June. March’s average wind speed of around 6.3 knots (7.2 MPH or 11.6 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early July where average top sustained speeds reach 14.3 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Heidelberg.
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Wind
The graph below shows wind speed (max and average) in knots.
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Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
Month | Avg. Wind | Avg. Wind Feel | Sustained High Wind | High Wind Feel |
Jan | 5.7 | Light breeze | 10.9 | Gentle breeze |
Feb | 4.8 | Light breeze | 10.3 | Gentle breeze |
Mar | 6.3 | Light breeze | 12.9 | Gentle breeze |
Apr | 5.1 | Light breeze | 11.3 | Significant breeze |
May | 4.8 | Light breeze | 10.6 | Gentle breeze |
Jun | 5.6 | Light breeze | 12.4 | Significant breeze |
Jul | 5.6 | Light breeze | 12.3 | Gentle breeze |
Aug | 4.3 | Light breeze | 9.2 | Gentle breeze |
Sep | 4.4 | Light breeze | 9.9 | Gentle breeze |
Oct | 4.1 | Light breeze | 8.9 | Gentle breeze |
Nov | 3.8 | Barely noticeable | 9.3 | Gentle breeze |
Dec | 4.9 | Light breeze | 9.7 | Gentle breeze |
Show Relative Humidity by Month
Month | Avg. Relative Humidity |
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Jan | 65.6% |
Feb | 65.2% |
Mar | 59% |
Apr | 48.5% |
May | 54.5% |
Jun | 54.4% |
Jul | 54% |
Aug | 53.9% |
Sep | 60.7% |
Oct | 67.4% |
Nov | 71.8% |
Dec | 75.2% |
Is it Safe to Travel to Heidelberg?
Our best data indicates this area is somewhat safe. As of Dec 04, 2023 there are travel warnings for Germany; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 30, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Heidelberg, Germany is July, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Heidelberg in December. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
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Overall Heidelberg Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 78.9°F (26.1°C) and 44.2°F (6.8°C) with warmer temperatures in the later months. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. June – August is the busiest season for tourism in Heidelberg, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 68.3°F (20.2°C) and 45.7°F (7.6°C), which will feel chilly given the humidity and wind. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.
Winter (December through February)
Weather is too cold this time of year in Heidelberg to be enjoyable for warm weather travelers. The average high during this season is between 51.1°F (10.6°C) and 35.8°F (2.1°C). These times of year are the slowest with tourists.
Best Times to Travel› Germany › Heidelberg, Germany