Haarlem climate
Haarlem (The Netherlands) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 11 °C52 °F, and about 896 mm35 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Haarlem climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 643 | 439 | 541 | 823.2 | 3 |
| Feb | 642 | 338 | 440 | 692.7 | 3 |
| Mar | 745 | 440 | 642 | 562.2 | 2 |
| Apr | 1151 | 744 | 948 | 411.6 | 0 |
| May | 1457 | 1050 | 1254 | 572.2 | 0 |
| Jun | 1762 | 1356 | 1559 | 632.5 | 0 |
| Jul | 1966 | 1661 | 1763 | 803.2 | 0 |
| Aug | 2067 | 1762 | 1865 | 963.8 | 0 |
| Sep | 1864 | 1559 | 1661 | 783.1 | 0 |
| Oct | 1458 | 1253 | 1355 | 933.6 | 0 |
| Nov | 1151 | 847 | 949 | 903.5 | 0 |
| Dec | 846 | 541 | 643 | 923.6 | 1 |
| Year | 2067 | 338 | 1152 | 89635 | 9 |
“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 | 88% | 79% | 0.7 | 8:11 |
| Feb | 87% | 76% | 1.4 | 9:49 |
| Mar | 86% | 70% | 2.7 | 11:42 |
| Apr | 84% | 64% | 4.3 | 13:51 |
| May | 83% | 66% | 5.2 | 15:42 |
| Jun | 82% | 71% | 5.4 | 16:46 |
| Jul | 81% | 69% | 5.2 | 16:20 |
| Aug | 80% | 69% | 4.4 | 14:40 |
| Sep | 80% | 67% | 3.1 | 12:34 |
| Oct | 83% | 72% | 1.8 | 10:30 |
| Nov | 86% | 78% | 0.8 | 8:39 |
| Dec | 87% | 79% | 0.5 | 7:42 |
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 Haarlem is like
The warmest month is August, with an average high of 20 °C67 °F and a low of 17 °C62 °F. The coldest is February, when highs average 6 °C42 °F and lows 3 °C38 °F. There is a clear seasonal cycle, with 13.6 °C24.6 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 896 mm35 in. The wettest three-month stretch is October–December, which brings 31% of the annual total. The wettest month is August (96 mm3.8 in), the driest is April (41 mm1.6 in).
Relative humidity ranges from 80% in September to 88% in January. The clearest skies (lowest average cloud amount, 64%) are typical of April. Average wind speed near the ground ranges from 16 km/h (10 mph) in June to 24 km/h (15 mph) in January. Daylight lasts from about 7.7 hours in December to 16.8 hours in June.
Best time to visit Haarlem
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 17 °C62 °F to 20 °C67 °F with 63 mm2.5 in to 96 mm3.8 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 6 °C43 °F.
Comfort score: months are ranked by how close they come to 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 Haarlem
- Winter (December–February) — highs 642 to 8 °C46 °F, lows 338 to 5 °C41 °F, about 81 mm3.2 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 745 to 14 °C57 °F, lows 440 to 10 °C50 °F, about 51 mm2.0 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Summer (June–August) — highs 1762 to 20 °C67 °F, lows 1356 to 17 °C62 °F, about 80 mm3.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
- Autumn (September–November) — highs 1151 to 18 °C64 °F, lows 847 to 15 °C59 °F, about 87 mm3.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Haarlem compares
Compared with Amsterdam, about 17 km to the east, Haarlem is on average 0.6 °C1.1 °F warmer and receives 8% more precipitation (896 mm35 in vs 827 mm33 in). The difference is largest in December (1.9 °C3.3 °F warmer).
Of the 17 places in The Netherlands covered by World Climates, Haarlem is the warmest by annual mean temperature and the wettest by annual precipitation. See all of them on the The Netherlands climate page.
Places in other countries with the most similar temperature and rainfall pattern: Brighton (United Kingdom, Cfb), Eastbourne (United Kingdom, Cfb) and Worthing (United Kingdom, Cfb).
Nearby places
- Amsterdam 17 km · 10 °C51 °F · 827 mm33 in
- Almere Stad 39 km · 10 °C51 °F · 827 mm33 in
- The Hague 41 km · 11 °C51 °F · 835 mm33 in
- Utrecht 46 km · 10 °C50 °F · 801 mm32 in
- Rotterdam 52 km · 11 °C51 °F · 835 mm33 in
- Amersfoort 57 km · 10 °C50 °F · 792 mm31 in
- Breda 89 km · 11 °C51 °F · 772 mm30 in
- Apeldoorn 93 km · 10 °C50 °F · 768 mm30 in
Frequently asked questions
What is the warmest month in Haarlem?
August is the warmest month in Haarlem, with an average high of 20 °C (67 °F) and an average low of 17 °C (62 °F).
What is the coldest month in Haarlem?
February is the coldest month, with an average high of 6 °C (42 °F) and an average low of 3 °C (38 °F).
When does it rain the most in Haarlem?
August is the wettest month with about 96 mm (3.8 in) of precipitation; April is the driest with about 41 mm (1.6 in).
What is the best time to visit Haarlem?
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 — most of all 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.