Guernsey Climate
Climate Zone and Historical Climate Data
Guernsey Climatic Classifications
| Code | Description | Group | Number of states/regions | States/regions |
|---|---|---|---|---|
| Cfb | Marine west coast, warm summer | Temperate | 16 | Alderney Brecqhou Castel Forest Herm Jethou Lihou Saint Martin Saint Peter Port Saint Pierre du Bois Saint Sampson Saint Saviour Sark St Andrew Torteval Vale |
Summary: Most regions (16) in Guernsey lie in the Marine west coast, warm summer climate zone (Köppen: Cfb). The mean average of annual temperatures range from a high of 12.51°C (54.52°F) in Lihou to a low of 12.38°C (54.28°F) in Alderney.
Climate Guernsey: Weather By Month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Nov | Oct | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high °C (°F) | 9.74(49.53) | 9.07(48.33) | 9.61(49.3) | 10.96(51.73) | 12.65(54.77) | 14.91(58.84) | 16.91(62.44) | 17.54(63.57) | 17.0(62.6) | 15.28(59.5) | 12.87(55.17) | 11.12(52.02) | 17.54(63.57) |
| Average high °C (°F) | 9.72(49.5) | 9.05(48.29) | 9.6(49.28) | 10.95(51.71) | 12.65(54.77) | 14.91(58.84) | 16.91(62.44) | 17.54(63.57) | 16.99(62.58) | 15.27(59.49) | 12.85(55.13) | 11.1(51.98) | 13.13(55.63) |
| Daily mean °C (°F) | 9.06(48.31) | 8.39(47.1) | 8.93(48.07) | 10.19(50.34) | 12.02(53.64) | 14.35(57.83) | 16.36(61.45) | 16.99(62.58) | 16.35(61.43) | 14.64(58.35) | 12.22(54.0) | 10.48(50.86) | 12.5(54.5) |
| Average low °C (°F) | 7.29(45.12) | 6.86(44.35) | 7.33(45.19) | 8.66(47.59) | 10.44(50.79) | 12.77(54.99) | 14.84(58.71) | 15.52(59.94) | 14.72(58.5) | 13.03(55.45) | 10.55(50.99) | 8.82(47.88) | 10.9(51.62) |
| Record low °C (°F) | 7.13(44.83) | 6.86(44.35) | 7.3(45.14) | 8.61(47.5) | 10.35(50.63) | 12.76(54.97) | 14.84(58.71) | 15.51(59.92) | 14.68(58.42) | 12.96(55.33) | 10.53(50.95) | 8.63(47.53) | 6.86(44.35) |
| Average precipitation mm (inches) | 64.51(2.54) | 51.69(2.04) | 39.26(1.55) | 30.26(1.19) | 27.33(1.08) | 32.44(1.28) | 24.01(0.95) | 43.08(1.7) | 37.2(1.46) | 69.28(2.73) | 74.08(2.92) | 79.69(3.14) | 47.74(1.88) |
| Average precipitation days (≥ 1.0 mm) | 14.32 | 12.22 | 9.46 | 7.42 | 6.24 | 5.89 | 6.74 | 8.84 | 7.67 | 13.09 | 16.12 | 14.96 | 10.25 |
| Average relative humidity (%) | 77.8 | 77.71 | 79.39 | 79.78 | 82.33 | 84.63 | 84.19 | 82.17 | 79.5 | 78.4 | 77.22 | 76.99 | 80.01 |
| Mean monthly sunshine hours | 5.52 | 6.19 | 9.14 | 12.37 | 13.09 | 13.27 | 13.42 | 12.71 | 11.04 | 6.72 | 5.86 | 5.33 | 9.55 |
Guernsey Climate Graph
Guernsey’s Cities by Temperature
Guernsey’s states/regions ranking by average yearly temperature:
| Lihou | 12.51°C | 54.52°F | |
| Saint Sampson | 12.51°C | 54.52°F | |
| Forest | 12.51°C | 54.52°F | |
| Torteval | 12.51°C | 54.52°F | |
| St Andrew | 12.51°C | 54.52°F | |
| Vale | 12.51°C | 54.52°F | |
| Jethou | 12.51°C | 54.52°F | |
| Saint Peter Port | 12.51°C | 54.52°F | |
| Saint Saviour | 12.51°C | 54.52°F | |
| Castel | 12.51°C | 54.52°F | |
| Saint Pierre du Bois | 12.51°C | 54.52°F | |
| Herm | 12.51°C | 54.52°F | |
| Brecqhou | 12.51°C | 54.52°F | |
| Sark | 12.51°C | 54.52°F | |
| Saint Martin | 12.51°C | 54.52°F | |
| Alderney | 12.38°C | 54.28°F |
Popular places in Guernsey
- Pleinheaume Vale
- Bailloterie Vale
- Saint Peter Port Saint Peter Port
- Coutanchez Saint Peter Port
- Le Foulon Saint Peter Port
- Saint Andrew St Andrew
- Mont Plaisant Castel
- Braye du Valle Saint Sampson
- Rousse Vale
- Les Martins Saint Sampson
- Les Touillets Castel
- La Porte Castel
- Le Fort Sark
- Les Falles Torteval
- Les Bas Courtils Saint Saviour
- Le Manoir Forest
- Hatnez Forest
- La Planque Castel
- Le Planel Torteval
- Le Gron Saint Saviour
- Les Heches Saint Pierre du Bois
- Le Tertre Vale
- L'Epinel Forest
- Newtown Alderney
- La Tourgie Forest
- Les Quartiers Saint Peter Port
- Hall Vale
- Le Picquerel Saint Sampson
- Le Vaugrat Vale
- La Colombelle Saint Martin
- La Ville Roussel Sark
- Mouilpied Saint Martin
- L'Ancresse Vale
- Blanches Rocques Castel
- La Villette Saint Martin
- La Fosse Saint Martin
- Les Houards Forest
- Saint Johns Saint Peter Port
- Carmel Saint Martin
- La Genetiere Sark
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