Climate guideThirty-year normals for Chartres
Chartres climate by month
Oceanic · CfbBest Jul–Sep
Annual mean11°day and night
Seasonal swing15°warmest vs coolest
Precipitation663 mm130 wet days a year
48.45° N, 1.49° EElevation 158 mUTC+1 · Central European Standard Time
When to goChartres · weather score
Best timeJul–Sep
October: high / low16° / 8°
iSummary
What the weather is like
Chartres 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 13°. 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 663 mm of precipitation falls in an average year. December is the wettest month (65 mm, 13 wet days) and September the driest (49 mm, 8 wet days). Cloud cover ranges from 34% in July to 55% in December.
Compared with Paris, the capital, Chartres is 0.3° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 26° · July
- Coldest nights
- 1° · February
- Wettest month
- December
- Driest month
- September
- Clearest skies
- July · 34% cloud
- Longest day
- 16 h 05 min
- Shortest day
- 8 h 20 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° | 8° | 12° | 16° | 19° | 23° | 26° | 26° | 22° | 16° | 11° | 7° |
| Average low | 2° | 1° | 3° | 5° | 8° | 11° | 13° | 13° | 10° | 8° | 4° | 2° |
| Precipitation | 57 mm | 46 mm | 51 mm | 50 mm | 63 mm | 51 mm | 59 mm | 46 mm | 49 mm | 70 mm | 56 mm | 65 mm |
| Wet days (≥1 mm) | 12.3 | 10.3 | 11.3 | 9.7 | 11.4 | 10.7 | 9.4 | 9.7 | 8.2 | 11.7 | 12.6 | 12.7 |
| Cloud cover | 54% | 49% | 46% | 42% | 42% | 37% | 34% | 34% | 37% | 46% | 50% | 55% |
| Daylight | 8h 45 | 10h 13 | 11h 50 | 13h 39 | 15h 13 | 16h 05 | 15h 44 | 14h 23 | 12h 38 | 10h 53 | 9h 15 | 8h 20 |
| Month score | 19 | 26 | 36 | 60 | 68 | 72 | 74 | 73 | 78 | 57 | 23 | 18 |
ivMonth by month
Chartres in every month
January19
7° / 2°
57 mm · 12.3 wet days
February26
8° / 1°
46 mm · 10.3 wet days
March36
12° / 3°
51 mm · 11.3 wet days
April60
16° / 5°
50 mm · 9.7 wet days
May68
19° / 8°
63 mm · 11.4 wet days
June72
23° / 11°
51 mm · 10.7 wet days
July74
26° / 13°
59 mm · 9.4 wet days
August73
26° / 13°
46 mm · 9.7 wet days
September78
22° / 10°
49 mm · 8.2 wet days
October57
16° / 8°
70 mm · 11.7 wet days
November23
11° / 4°
56 mm · 12.6 wet days
December18
7° / 2°
65 mm · 12.7 wet days