Saint John (Canada) vs San José (Costa Rica): Temperature, Rainfall and Sunshine
San José (Costa Rica) has a higher monthly mean temperature than Saint John (Canada) in every month of the year.
| Key monthly differences | Saint John | San José |
|---|---|---|
| Warmest months (mean temperature) (°C) | August: 17.10 | April: 21.28 |
| Coolest months (mean temperature) (°C) | February: -3.02 | October: 19.72 |
| Months with the lowest daily rainfall average (mm/day) | March: 1.66 | February: 0.41 |
| Months with the most daily sunshine (hours/day) | July: 9.07 | March: 10.80 |
Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 3.21 °C (August); the largest is 23.58 °C (February).
How much do temperatures vary across the year?
The difference between the warmest and coolest monthly means is 20.12 °C in Saint John (Canada) and 1.56 °C in San José (Costa Rica). This describes seasonal variation, not the range between daytime highs and nighttime lows.
Which location has more rainfall?
Saint John (Canada) has a higher daily rainfall average in 3 months and San José (Costa Rica) in 9; 0 months are equal at the displayed precision. Rainfall amounts do not tell us how many days it rains.
Which location has more sunshine?
Saint John (Canada) has more average sunshine hours per day in 4 months and San José (Costa Rica) in 8; 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.
- Saint John (Canada) — Reference period: 2013–2023
- San José (Costa Rica) — Reference period: 2013–2023
Monthly climate data
Difference: San José (Costa Rica) minus Saint John (Canada)
Temperature °C
| Month | Saint John | San José | +/- |
|---|---|---|---|
| Jan | -1.90 | 20.06 | 21.95 |
| Feb | -3.02 | 20.56 | 23.58 |
| Mar | -1.50 | 21.01 | 22.51 |
| Apr | 2.05 | 21.28 | 19.22 |
| May | 5.91 | 20.70 | 14.79 |
| Jun | 10.64 | 20.43 | 9.80 |
| Jul | 15.95 | 20.50 | 4.56 |
| Aug | 17.10 | 20.31 | 3.21 |
| Sep | 13.99 | 20.02 | 6.03 |
| Oct | 9.28 | 19.72 | 10.43 |
| Nov | 4.66 | 19.82 | 15.16 |
| Dec | 0.24 | 19.91 | 19.68 |
| ⌀ Month | 6.12 | 20.36 | 14.24 |
Average sunshine (hours/day)
| Month | Saint John | San José | +/- |
|---|---|---|---|
| Jan | 3.70 | 10.28 | 6.59 |
| Feb | 4.70 | 10.74 | 6.04 |
| Mar | 6.43 | 10.80 | 4.37 |
| Apr | 6.74 | 10.02 | 3.28 |
| May | 8.33 | 8.24 | -0.09 |
| Jun | 7.81 | 7.72 | -0.09 |
| Jul | 9.07 | 8.01 | -1.07 |
| Aug | 8.46 | 8.12 | -0.34 |
| Sep | 7.07 | 7.91 | 0.85 |
| Oct | 5.34 | 7.42 | 2.08 |
| Nov | 3.86 | 8.23 | 4.38 |
| Dec | 3.02 | 9.88 | 6.85 |
| ⌀ Month | 6.21 | 8.95 | 2.74 |
Average daily rainfall (mm/day)
| Month | Saint John | San José | +/- |
|---|---|---|---|
| Jan | 2.47 | 1.00 | -1.47 |
| Feb | 1.71 | 0.41 | -1.30 |
| Mar | 1.66 | 0.85 | -0.81 |
| Apr | 2.62 | 3.32 | 0.69 |
| May | 2.62 | 11.67 | 9.05 |
| Jun | 3.18 | 11.59 | 8.40 |
| Jul | 2.70 | 8.48 | 5.77 |
| Aug | 3.03 | 12.17 | 9.13 |
| Sep | 3.95 | 14.08 | 10.13 |
| Oct | 3.15 | 16.62 | 13.47 |
| Nov | 3.93 | 9.21 | 5.28 |
| Dec | 2.27 | 2.45 | 0.18 |
| ⌀ Month | 2.78 | 7.65 | 4.88 |
Snow (mm)
| Month | Saint John | San José | +/- |
|---|---|---|---|
| Jan | 19.32 | 0.00 | -19.32 |
| Feb | 18.79 | 0.00 | -18.79 |
| Mar | 14.35 | 0.00 | -14.35 |
| Apr | 6.91 | 0.00 | -6.91 |
| May | 1.16 | 0.00 | -1.16 |
| Jun | 0.20 | 0.00 | -0.20 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.00 | 0.00 |
| Oct | 0.10 | 0.00 | -0.10 |
| Nov | 3.59 | 0.00 | -3.59 |
| Dec | 12.13 | 0.00 | -12.13 |
| ⌀ Month | 6.38 | 0.00 | -6.38 |
