Best time to visit Heerlen
The best time to visit Heerlen is May–September, judged on twenty years of weather records and the events worth going for.
Heerlen, Limburg, The Netherlands
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 5.6 °C / 42 °F | 1.5 °C / 35 °F | 69 mm / 2.7 in | neither best nor good |
| February | 7.1 °C / 45 °F | 2 °C / 36 °F | 58 mm / 2.3 in | neither best nor good |
| March | 10.7 °C / 51 °F | 3.3 °C / 38 °F | 57 mm / 2.3 in | neither best nor good |
| April | 15 °C / 59 °F | 5.8 °C / 42 °F | 42 mm / 1.6 in | good month |
| May | 18.5 °C / 65 °F | 9.5 °C / 49 °F | 62 mm / 2.4 in | best month |
| June | 22 °C / 72 °F | 13 °C / 55 °F | 65 mm / 2.6 in | best month |
| July | 23.7 °C / 75 °F | 14.8 °C / 59 °F | 74 mm / 2.9 in | best month |
| August | 23.2 °C / 74 °F | 14.4 °C / 58 °F | 70 mm / 2.8 in | best month |
| September | 19.9 °C / 68 °F | 11.6 °C / 53 °F | 56 mm / 2.2 in | best month |
| October | 15.2 °C / 59 °F | 8.9 °C / 48 °F | 67 mm / 2.6 in | good month |
| November | 10 °C / 50 °F | 5.2 °C / 41 °F | 63 mm / 2.5 in | neither best nor good |
| December | 6.8 °C / 44 °F | 2.9 °C / 37 °F | 71 mm / 2.8 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: best
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: good
- NNovember: neither
- DDecember: neither
- Best
- May–September
- Good
- April, October
Why these months
April · good
In its favour: precipitation 42 mm / 1.6 in, share of daylight that is sunny 73%, days with heavy rain 0.6 days, average daily high 15 °C / 59 °F, wet days 9.4 days, relative humidity 69%, average daily low 5.8 °C / 42 °F.
Against: feels like (high) 12.1 °C / 54 °F.
May · best
In its favour: feels like (high) 16.7 °C / 62 °F, average daily high 18.5 °C / 65 °F, share of daylight that is sunny 70%, precipitation 62 mm / 2.4 in, days with heavy rain 1.1 days, average daily low 9.5 °C / 49 °F, relative humidity 70%, wet days 12 days.
June · best
In its favour: feels like (high) 21.3 °C / 70 °F, average daily high 22 °C / 72 °F, share of daylight that is sunny 69%, precipitation 65 mm / 2.6 in, days with heavy rain 1.5 days, average daily low 13 °C / 55 °F, wet days 10.7 days, relative humidity 70%.
July · best
In its favour: feels like (high) 23.2 °C / 74 °F, average daily high 23.7 °C / 75 °F, share of daylight that is sunny 72%, precipitation 74 mm / 2.9 in, days with heavy rain 1.8 days, average daily low 14.8 °C / 59 °F, relative humidity 70%.
Against: wet days 12.9 days.
August · best
In its favour: feels like (high) 22.6 °C / 73 °F, average daily high 23.2 °C / 74 °F, share of daylight that is sunny 72%, precipitation 70 mm / 2.8 in, days with heavy rain 1.8 days, average daily low 14.4 °C / 58 °F, relative humidity 73%.
Against: wet days 12.8 days.
September · best
In its favour: feels like (high) 18.5 °C / 65 °F, average daily high 19.9 °C / 68 °F, precipitation 56 mm / 2.2 in, share of daylight that is sunny 69%, days with heavy rain 1.2 days, wet days 9.5 days, average daily low 11.6 °C / 53 °F.
Against: relative humidity 77%.
October · good
In its favour: share of daylight that is sunny 57%, precipitation 67 mm / 2.6 in, feels like (high) 13.1 °C / 56 °F, average daily high 15.2 °C / 59 °F, days with heavy rain 1.8 days, average daily low 8.9 °C / 48 °F, wet days 11.9 days.
Against: relative humidity 82%.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Kreuzberg, 288 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 1.7 °C | 3.2 °C | 7 °C | 12.1 °C | 16.7 °C | 21.3 °C | 23.2 °C | 22.6 °C | 18.5 °C | 13.1 °C | 7.1 °C | 3.2 °C |
| Days with heavy rain | 1.4 days | 1.1 days | 1.1 days | 0.6 days | 1.1 days | 1.5 days | 1.8 days | 1.8 days | 1.2 days | 1.8 days | 1.2 days | 1.6 days |
| Time rain usually falls | 12 pm | 9 pm | 5 pm | 5 pm | 6 pm | 7 pm | 4 pm | 5 pm | 5 pm | 11 pm | 5 pm | 9 am |
| Sunshine per day | 3.8 h | 5.2 h | 7.5 h | 10.2 h | 10.8 h | 11.3 h | 11.5 h | 10.4 h | 8.7 h | 6.1 h | 4.4 h | 3.2 h |
| Relative humidity | 86% | 81% | 74% | 69% | 70% | 70% | 70% | 73% | 77% | 82% | 86% | 87% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 8.5 µg/m³ | 10 µg/m³ | 10.9 µg/m³ | 11 µg/m³ | 12.1 µg/m³ | 13.2 µg/m³ | 11.5 µg/m³ | 11.3 µg/m³ | 9.3 µg/m³ | 8.6 µg/m³ | 7.5 µg/m³ | 7.5 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 13.9 µg/m³ | 16 µg/m³ | 17.9 µg/m³ | 17.7 µg/m³ | 18.2 µg/m³ | 20.1 µg/m³ | 18.4 µg/m³ | 17.3 µg/m³ | 13.9 µg/m³ | 13.6 µg/m³ | 11.7 µg/m³ | 12 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
World Heritage sites nearby
UNESCO World Heritage sites within 25 km, nearest first.
- Aachen Cathedral
14 km away