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> Saint Helena > Jamestown > Precipitation
Rainfall/ Precipitation in Jamestown, Saint Helena
- Jamestown receives 137 mm (5.4 in) of rainfall per year, or 11.4 mm (0.5 in) per month.
- On average there are 41 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 3.4 days with a quantity of rain, sleet, snow etc. per month.
- The driest weather is in November when an average of 0 mm (0 in) of rainfall (precipitation) occurs.
- The wettest weather is in July when an average of 33 mm (1.3 in) of rainfall (precipitation) occurs.
Precipitation Table
| Climate Variable | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Annual | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Average Precipitation mm (in) | 33 (1.3) | 10 (0.4) | 5 (0.2) | 2 (0.1) | 0 (0) | 3 (0.1) | 8 (0.3) | 10 (0.4) | 20 (0.8) | 10 (0.4) | 18 (0.7) | 18 (0.7) | 137 (5.4) | |
 | Precipitation Litres/m² (Gallons/ft²) | 33 (0.81) | 10 (0.25) | 5 (0.12) | 2 (0.05) | 0 (0) | 3 (0.07) | 8 (0.2) | 10 (0.25) | 20 (0.49) | 10 (0.25) | 18 (0.44) | 18 (0.44) | 137 (3.36) | |
 | Number of Wet Days (probability of rain on a day) | 8 (26%) | 3 (10%) | 2 (7%) | 1 (3%) | 0 (0%) | 1 (3%) | 4 (13%) | 4 (14%) | 5 (16%) | 3 (10%) | 4 (13%) | 6 (20%) | 41 (11%) |