Warmest month
- London
- July · 18.57 °C
- Saint Barthelemy (St. Barts)
- September · 27.53 °C
London (Great Britain) vs Saint Barthelemy (St. Barts) (Saint Barthélemy): Temperature, Rainfall and Sunshine
Reference period: London 2013–2023 · Saint Barthelemy (St. Barts) 2013–2023
Saint Barthelemy (St. Barts) (Saint Barthélemy) has a higher monthly mean temperature than London (Great Britain) in every month of the year.
Key monthly differences
Coolest month
- London
- January · 4.73 °C
- Saint Barthelemy (St. Barts)
- February · 24.73 °C
Driest month
- London
- April · 1.33 mm/day
- Saint Barthelemy (St. Barts)
- March · 0.64 mm/day
Sunniest month
- London
- July · 10.94 hours/day
- Saint Barthelemy (St. Barts)
- June · 11.66 hours/day
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Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 8.46 °C (July); the largest is 20.27 °C (January).
How much do temperatures vary across the year?
The difference between the warmest and coolest monthly means is 13.84 °C in London (Great Britain) and 2.81 °C in Saint Barthelemy (St. Barts) (Saint Barthélemy). This describes seasonal variation, not the range between daytime highs and nighttime lows.
Which location has more rainfall?
London (Great Britain) has a higher daily rainfall average in 7 months and Saint Barthelemy (St. Barts) (Saint Barthélemy) in 5; 0 months are equal at the displayed precision. Rainfall amounts do not tell us how many days it rains.
Which location has more sunshine?
London (Great Britain) has more average sunshine hours per day in 0 months and Saint Barthelemy (St. Barts) (Saint Barthélemy) in 12; 0 months are equal at the displayed precision. Sunshine duration is different from daylight duration.
Climate data notes
Show data and calculation
Daily values are averaged separately for each calendar month over the saved reference period. Temperatures are daily means, not daytime highs. Rainfall is an average daily amount, not a monthly total; sunshine is average hours per day. These historical averages are not a weather forecast. Each location’s reference period is listed below and may differ.
Mean of the 12 monthly averages
Monthly climate data
Difference: Saint Barthelemy (St. Barts) (Saint Barthélemy) minus London (Great Britain)
Temperature °C
| Month | London | Saint Barthelemy (St. Barts) | +/- |
|---|---|---|---|
| Jan | 4.73 | 25.00 | +20.27 |
| Feb | 5.44 | 24.73 | +19.28 |
| Mar | 6.84 | 24.76 | +17.93 |
| Apr | 9.18 | 25.16 | +15.98 |
| May | 12.67 | 25.98 | +13.32 |
| Jun | 16.27 | 26.72 | +10.45 |
| Jul | 18.57 | 27.03 | +8.46 |
| Aug | 17.74 | 27.37 | +9.64 |
| Sep | 15.48 | 27.53 | +12.05 |
| Oct | 12.31 | 27.27 | +14.96 |
| Nov | 8.09 | 26.60 | +18.51 |
| Dec | 6.52 | 25.78 | +19.26 |
| Annual mean | 11.15 | 26.16 | +15.01 |
Average sunshine (hours/day)
| Month | London | Saint Barthelemy (St. Barts) | +/- |
|---|---|---|---|
| Jan | 3.74 | 10.36 | +6.62 |
| Feb | 5.11 | 10.74 | +5.62 |
| Mar | 6.38 | 11.08 | +4.70 |
| Apr | 9.22 | 11.44 | +2.22 |
| May | 10.11 | 11.50 | +1.40 |
| Jun | 10.51 | 11.66 | +1.15 |
| Jul | 10.94 | 11.62 | +0.68 |
| Aug | 9.68 | 11.19 | +1.51 |
| Sep | 8.02 | 10.68 | +2.66 |
| Oct | 5.86 | 10.07 | +4.20 |
| Nov | 4.12 | 9.62 | +5.51 |
| Dec | 3.14 | 10.00 | +6.85 |
| Annual mean | 7.24 | 10.83 | +3.59 |
Average daily rainfall (mm/day)
| Month | London | Saint Barthelemy (St. Barts) | +/- |
|---|---|---|---|
| Jan | 1.92 | 1.05 | −0.87 |
| Feb | 1.71 | 1.11 | −0.60 |
| Mar | 1.61 | 0.64 | −0.96 |
| Apr | 1.33 | 1.25 | −0.08 |
| May | 1.85 | 1.52 | −0.33 |
| Jun | 1.93 | 1.32 | −0.61 |
| Jul | 1.79 | 1.81 | +0.01 |
| Aug | 2.02 | 2.64 | +0.61 |
| Sep | 1.61 | 3.96 | +2.34 |
| Oct | 2.51 | 3.91 | +1.40 |
| Nov | 2.27 | 3.37 | +1.09 |
| Dec | 2.10 | 1.56 | −0.55 |
| Annual mean | 1.89 | 2.01 | +0.12 |
Snow (mm)
| Month | London | Saint Barthelemy (St. Barts) | +/- |
|---|---|---|---|
| Jan | 0.94 | 0.00 | −0.94 |
| Feb | 0.76 | 0.00 | −0.76 |
| Mar | 0.77 | 0.00 | −0.77 |
| Apr | 0.05 | 0.00 | −0.05 |
| May | 0.00 | 0.00 | 0.00 |
| Jun | 0.00 | 0.00 | 0.00 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.00 | 0.00 |
| Oct | 0.00 | 0.00 | 0.00 |
| Nov | 0.04 | 0.00 | −0.04 |
| Dec | 0.40 | 0.00 | −0.40 |
| Annual mean | 0.25 | 0.00 | −0.25 |
