London (Great Britain) vs Saint John (Canada): Temperature, Rainfall and Sunshine
London (Great Britain) has a higher monthly mean temperature than Saint John (Canada) in every month of the year.
| Key monthly differences | London | Saint John |
|---|---|---|
| Warmest months (mean temperature) (°C) | July: 18.57 | August: 17.10 |
| Coolest months (mean temperature) (°C) | January: 4.73 | February: -3.02 |
| Months with the lowest daily rainfall average (mm/day) | April: 1.33 | March: 1.66 |
| Months with the most daily sunshine (hours/day) | July: 10.94 | July: 9.07 |
Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 0.64 °C (August); the largest is 8.46 °C (February).
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 20.12 °C in Saint John (Canada). 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 0 months and Saint John (Canada) in 11; 1 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 11 months and Saint John (Canada) in 1; 0 months are equal at the displayed precision. Sunshine duration is different from daylight duration.
Data and measurement guide
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.
- London (Great Britain) — Reference period: 2013–2023
- Saint John (Canada) — Reference period: 2013–2023
Monthly climate data
Difference: Saint John (Canada) minus London (Great Britain)
Temperature °C
| Month | London | Saint John | +/- |
|---|---|---|---|
| Jan | 4.73 | -1.90 | -6.62 |
| Feb | 5.44 | -3.02 | -8.46 |
| Mar | 6.84 | -1.50 | -8.34 |
| Apr | 9.18 | 2.05 | -7.13 |
| May | 12.67 | 5.91 | -6.75 |
| Jun | 16.27 | 10.64 | -5.63 |
| Jul | 18.57 | 15.95 | -2.62 |
| Aug | 17.74 | 17.10 | -0.64 |
| Sep | 15.48 | 13.99 | -1.50 |
| Oct | 12.31 | 9.28 | -3.02 |
| Nov | 8.09 | 4.66 | -3.43 |
| Dec | 6.52 | 0.24 | -6.28 |
| ⌀ Month | 11.15 | 6.12 | -5.04 |
Average sunshine (hours/day)
| Month | London | Saint John | +/- |
|---|---|---|---|
| Jan | 3.74 | 3.70 | -0.05 |
| Feb | 5.11 | 4.70 | -0.41 |
| Mar | 6.38 | 6.43 | 0.05 |
| Apr | 9.22 | 6.74 | -2.49 |
| May | 10.11 | 8.33 | -1.78 |
| Jun | 10.51 | 7.81 | -2.71 |
| Jul | 10.94 | 9.07 | -1.87 |
| Aug | 9.68 | 8.46 | -1.22 |
| Sep | 8.02 | 7.07 | -0.95 |
| Oct | 5.86 | 5.34 | -0.52 |
| Nov | 4.12 | 3.86 | -0.26 |
| Dec | 3.14 | 3.02 | -0.12 |
| ⌀ Month | 7.24 | 6.21 | -1.03 |
Average daily rainfall (mm/day)
| Month | London | Saint John | +/- |
|---|---|---|---|
| Jan | 1.92 | 2.47 | 0.55 |
| Feb | 1.71 | 1.71 | 0.00 |
| Mar | 1.61 | 1.66 | 0.05 |
| Apr | 1.33 | 2.62 | 1.29 |
| May | 1.85 | 2.62 | 0.77 |
| Jun | 1.93 | 3.18 | 1.25 |
| Jul | 1.79 | 2.70 | 0.91 |
| Aug | 2.02 | 3.03 | 1.01 |
| Sep | 1.61 | 3.95 | 2.33 |
| Oct | 2.51 | 3.15 | 0.64 |
| Nov | 2.27 | 3.93 | 1.66 |
| Dec | 2.10 | 2.27 | 0.16 |
| ⌀ Month | 1.89 | 2.78 | 0.89 |
Snow (mm)
| Month | London | Saint John | +/- |
|---|---|---|---|
| Jan | 0.94 | 19.32 | 18.38 |
| Feb | 0.76 | 18.79 | 18.03 |
| Mar | 0.77 | 14.35 | 13.58 |
| Apr | 0.05 | 6.91 | 6.86 |
| May | 0.00 | 1.16 | 1.16 |
| Jun | 0.00 | 0.20 | 0.20 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.00 | 0.00 |
| Oct | 0.00 | 0.10 | 0.10 |
| Nov | 0.04 | 3.59 | 3.56 |
| Dec | 0.40 | 12.13 | 11.73 |
| ⌀ Month | 0.25 | 6.38 | 6.13 |
