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Climate guideThirty-year normals for Châtillon, Île-de-France
Châtillon climate by month
Oceanic · CfbBest Jun–Jul · Sep
Annual mean12°day and night
Seasonal swing15°warmest vs coolest
Precipitation679 mm134 wet days a year
48.80° N, 2.29° EElevation 104 mUTC+1 · Central European Standard Time
When to goChâtillon · weather score
Best timeJun–Jul · Sep
October: high / low16° / 9°
iSummary
What the weather is like
Châtillon has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is July, when afternoons average 26° and nights 15°. January is the coolest month, with highs of 7° and lows of 2°. The difference between the warmest and the coolest month is about 15°.
About 679 mm of precipitation falls in an average year. January is the wettest month (56 mm, 13 wet days) and September the driest (49 mm, 9 wet days). Cloud cover ranges from 34% in July to 54% in December.
Compared with Paris, the capital, Châtillon is 0.3° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 26° · July
- Coldest nights
- 2° · February
- Wettest month
- January
- Driest month
- September
- Clearest skies
- July · 34% cloud
- Longest day
- 16 h 09 min
- Shortest day
- 8 h 17 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 7° | 9° | 13° | 16° | 20° | 23° | 26° | 26° | 21° | 16° | 11° | 8° |
| Average low | 2° | 2° | 4° | 6° | 10° | 13° | 15° | 15° | 12° | 9° | 5° | 3° |
| Precipitation | 56 mm | 47 mm | 52 mm | 52 mm | 66 mm | 56 mm | 61 mm | 54 mm | 49 mm | 68 mm | 54 mm | 64 mm |
| Wet days (≥1 mm) | 12.7 | 10.8 | 11.6 | 9.6 | 11.8 | 11.1 | 10.6 | 10.7 | 8.8 | 12.1 | 12 | 12.7 |
| Cloud cover | 53% | 49% | 45% | 42% | 42% | 38% | 34% | 34% | 38% | 46% | 49% | 54% |
| Daylight | 8h 42 | 10h 11 | 11h 50 | 13h 41 | 15h 15 | 16h 09 | 15h 47 | 14h 24 | 12h 38 | 10h 52 | 9h 12 | 8h 17 |
| Month score | 18 | 25 | 38 | 63 | 67 | 71 | 71 | 71 | 76 | 56 | 26 | 18 |
ivMonth by month
Châtillon in every month
January18
7° / 2°
56 mm · 12.7 wet days
February25
9° / 2°
47 mm · 10.8 wet days
March38
13° / 4°
52 mm · 11.6 wet days
April63
16° / 6°
52 mm · 9.6 wet days
May67
20° / 10°
66 mm · 11.8 wet days
June71
23° / 13°
56 mm · 11.1 wet days
July71
26° / 15°
61 mm · 10.6 wet days
August71
26° / 15°
54 mm · 10.7 wet days
September76
21° / 12°
49 mm · 8.8 wet days
October56
16° / 9°
68 mm · 12.1 wet days
November26
11° / 5°
54 mm · 12 wet days
December18
8° / 3°
64 mm · 12.7 wet days