Climate averages 1991–2020
Saint Helier weather
in March.
A cool, moderately wet month: the 10th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cool month in Saint Helier: daytime highs average 9.7°C and nights cool to about 7.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 69 mm of rain on roughly 12 days, which makes March a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 51 min on an average March day.
The nearest other city in this atlas is Rennes (124 km away). In March its highs average 12.2°C, 2.5°C warmer than Saint Helier, with 52 mm of rain.
From March to April, average highs rise by 1.6°C to 11.3°C, and monthly rainfall falls from 69 mm to 57 mm.
The annual picture
March in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint Helier climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.1°C6.8°C | 6.8°C | 110 | 15.8 | 8.79 h |
| February | 8.7°C6.3°C | 6.3°C | 82 | 13.0 | 10.110 h |
| March, selected | 9.7°C7.3°C | 7.3°C | 69 | 12.4 | 11.912 h |
| April | 11.3°C8.6°C | 8.6°C | 57 | 10.5 | 13.714 h |
| May | 13.7°C11.0°C | 11.0°C | 53 | 9.4 | 15.315 h |
| June | 16.1°C13.4°C | 13.4°C | 50 | 8.7 | 16.216 h |
| July | 17.9°C15.4°C | 15.4°C | 48 | 9.1 | 15.816 h |
| August | 18.5°C16.1°C | 16.1°C | 63 | 9.8 | 14.414 h |
| September | 17.5°C15.1°C | 15.1°C | 77 | 11.0 | 12.713 h |
| October | 15.2°C12.9°C | 12.9°C | 122 | 15.5 | 10.811 h |
| November | 12.2°C10.0°C | 10.0°C | 132 | 17.6 | 9.29 h |
| December | 10.0°C7.7°C | 7.7°C | 138 | 16.7 | 8.38 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Rennes in MarchFrance · 124 kmHigh 12.2°C · Low 4.6°C · 52 mm rain
- Caen in MarchFrance · 127 kmHigh 11.6°C · Low 4.5°C · 54 mm rain
- Le Havre in MarchFrance · 164 kmHigh 10.8°C · Low 5.3°C · 66 mm rain
- Poole in MarchUnited Kingdom · 170 kmHigh 10.0°C · Low 5.1°C · 49 mm rain
- Bournemouth in MarchUnited Kingdom · 171 kmHigh 9.9°C · Low 5.0°C · 49 mm rain
- Portsmouth in MarchUnited Kingdom · 193 kmHigh 10.3°C · Low 4.4°C · 50 mm rain
- Brest, France in MarchFrance · 196 kmHigh 10.9°C · Low 7.1°C · 64 mm rain
- Plymouth in MarchUnited Kingdom · 197 kmHigh 10.2°C · Low 5.2°C · 67 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint Helier) is explained once on the Saint Helier year overview and on the Sources, method and limits page.