Saint John (Canada) vs Sun Valley (USA): Temperature, Rainfall and Sunshine
Sun Valley (USA) has a higher monthly mean temperature than Saint John (Canada) in every month of the year.
| Key monthly differences | Saint John | Sun Valley |
|---|---|---|
| Warmest months (mean temperature) (°C) | August: 17.10 | July: 25.01 |
| Coolest months (mean temperature) (°C) | February: -3.02 | December: 0.65 |
| Months with the lowest daily rainfall average (mm/day) | March: 1.66 | July: 0.21 |
| Months with the most daily sunshine (hours/day) | July: 9.07 | June: 13.44 |
Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 0.41 °C (December); the largest is 10.14 °C (June).
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 24.37 °C in Sun Valley (USA). 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 12 months and Sun Valley (USA) in 0; 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 0 months and Sun Valley (USA) in 12; 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
- Sun Valley (USA) — Reference period: 2013–2023
Monthly climate data
Difference: Sun Valley (USA) minus Saint John (Canada)
Temperature °C
| Month | Saint John | Sun Valley | +/- |
|---|---|---|---|
| Jan | -1.90 | 1.08 | 2.97 |
| Feb | -3.02 | 2.38 | 5.41 |
| Mar | -1.50 | 5.29 | 6.80 |
| Apr | 2.05 | 9.67 | 7.62 |
| May | 5.91 | 14.31 | 8.39 |
| Jun | 10.64 | 20.78 | 10.14 |
| Jul | 15.95 | 25.01 | 9.07 |
| Aug | 17.10 | 23.79 | 6.69 |
| Sep | 13.99 | 19.16 | 5.17 |
| Oct | 9.28 | 12.38 | 3.10 |
| Nov | 4.66 | 5.34 | 0.68 |
| Dec | 0.24 | 0.65 | 0.41 |
| ⌀ Month | 6.12 | 11.65 | 5.54 |
Average sunshine (hours/day)
| Month | Saint John | Sun Valley | +/- |
|---|---|---|---|
| Jan | 3.70 | 7.42 | 3.72 |
| Feb | 4.70 | 8.79 | 4.09 |
| Mar | 6.43 | 9.71 | 3.28 |
| Apr | 6.74 | 11.46 | 4.72 |
| May | 8.33 | 12.41 | 4.08 |
| Jun | 7.81 | 13.44 | 5.63 |
| Jul | 9.07 | 13.36 | 4.28 |
| Aug | 8.46 | 12.29 | 3.84 |
| Sep | 7.07 | 11.20 | 4.13 |
| Oct | 5.34 | 9.57 | 4.22 |
| Nov | 3.86 | 8.16 | 4.30 |
| Dec | 3.02 | 6.81 | 3.79 |
| ⌀ Month | 6.21 | 10.38 | 4.17 |
Average daily rainfall (mm/day)
| Month | Saint John | Sun Valley | +/- |
|---|---|---|---|
| Jan | 2.47 | 0.93 | -1.54 |
| Feb | 1.71 | 1.12 | -0.59 |
| Mar | 1.66 | 0.74 | -0.92 |
| Apr | 2.62 | 0.61 | -2.01 |
| May | 2.62 | 0.75 | -1.87 |
| Jun | 3.18 | 0.25 | -2.94 |
| Jul | 2.70 | 0.21 | -2.50 |
| Aug | 3.03 | 0.22 | -2.82 |
| Sep | 3.95 | 0.48 | -3.47 |
| Oct | 3.15 | 0.97 | -2.18 |
| Nov | 3.93 | 0.78 | -3.15 |
| Dec | 2.27 | 1.14 | -1.13 |
| ⌀ Month | 2.78 | 0.68 | -2.09 |
Snow (mm)
| Month | Saint John | Sun Valley | +/- |
|---|---|---|---|
| Jan | 19.32 | 8.20 | -11.12 |
| Feb | 18.79 | 6.13 | -12.66 |
| Mar | 14.35 | 5.21 | -9.14 |
| Apr | 6.91 | 1.10 | -5.81 |
| May | 1.16 | 0.29 | -0.88 |
| Jun | 0.20 | 0.04 | -0.16 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.00 | 0.00 |
| Sep | 0.00 | 0.04 | 0.04 |
| Oct | 0.10 | 0.45 | 0.34 |
| Nov | 3.59 | 1.69 | -1.91 |
| Dec | 12.13 | 6.29 | -5.83 |
| ⌀ Month | 6.38 | 2.45 | -3.93 |
