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Guernsey Monthly Climate Averages
To help you choose the best time to travel, you can find climate data below on the weather in Guernsey .
| Month |  day |
 night |
 rain |
 |
| January | +8.7 | +5 | 93 | 9.3h |
| February | +8.4 | +4.5 | 70 | 10.7h |
| March | +10 | +5.6 | 67 | 12.5h |
| April | +11.9 | +6.7 | 53 | 14.4h |
| May | +14.9 | +9.2 | 51 | 16h |
| June | +17.5 | +11.6 | 46 | 16.9h |
| July | +19.5 | +13.7 | 42 | 16.4h |
| August | +19.8 | +14.1 | 48 | 14.9h |
| September | +18 | +13.1 | 58 | 13.1h |
| October | +15 | +11 | 95 | 11.3h |
| November | +11.8 | +8.1 | 104 | 9.7h |
| December | +9.6 | +5.9 | 113 | 8.9h |
Best time with the soft weather for the sightseeing and long walks in Guernsey are July, August, September.
Temperature in Guernsey
The table shows that the hottest months in Guernsey are August and July, during which the average daytime temperature reaches +19.8°C and the nighttime temperature falls to +14.1°C.
The coldest months are February and January, when the daily average temperature falls to +8.4°C, and drops to +4.5°C during the night.
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Sea temperature
The month with the highest average monthly temperature in the English Channel on the beaches of Guernsey is September with 18 degrees.
The coldest water can be found in February — 8.8degrees C.
Precipitation
The largest amount of precipitation falls on average in December and November, up to 113mm, and the least in July and June — up to 42mm.