| Average climate data for Fort Saint James, Canada | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | -4 | -2 | 4 | 10 | 16 | 19 | 21 | 21 | 16 | 9 | -0 | -5 | 21 |
| Average minimum temperature (°C) | -12 | -11 | -7 | -3 | 2 | 6 | 8 | 7 | 3 | -1 | -8 | -14 | -14 |
| Average precipitation (mm) | 3 | 4 | 3 | 18 | 38 | 55 | 47 | 43 | 40 | 35 | 11 | 4 | 302 |
| Average rainfall days (days) | 2 | 3 | 3 | 7 | 14 | 15 | 14 | 13 | 12 | 14 | 5 | 2 | 103 |
| Average snowfall (mm) | 458 | 283 | 233 | 87 | 6 | 0 | 0 | 0 | 0 | 89 | 402 | 391 | 1,950 |
| Average snowfall days (days) | 15 | 9 | 7 | 4 | 1 | 0 | 0 | 0 | 0 | 3 | 13 | 12 | 63 |
| Average relative humidity (%) | 82 | 72 | 57 | 46 | 44 | 47 | 46 | 48 | 53 | 62 | 80 | 85 | 60 |
| Average daily daylight hours (h) | 8 | 9 | 11 | 14 | 16 | 17 | 16 | 14 | 12 | 10 | 8 | 7 | 12 |
| Average daily sunshine hours (h) | 1 | 3 | 4 | 6 | 7 | 8 | 8 | 8 | 5 | 3 | 2 | 1 | 5 |
The warmest month, with the highest average maximum temperature, is July (21.4 °C). The month with the lowest average maximum temperature is December (-5.2 °C). Overall, the average maximum temperature over the whole year is 8.7 °C.
The month with the highest average minimum temperature is July (7.7 °C). The coldest month, with the lowest average minimum temperature, is December (-13.6 °C). Overall, the average minimum temperature over the whole year is -2.6 °C.
The wettest month, with the highest amount of precipitation, is June (54.7 mm). The driest month, with the least amount of precipitation, is March (3 mm). Over the whole year there are 302.3 mm of rainfall on average.
The month with the most days of rain is June (14.7 days). The month with the fewest days of rain is December (1.5 days). Over the whole year there are 102.5 days of rain on average.
The month with the most snowfall is January (458.3 mm). The months with the least snowfall are June, July, August and September (0 mm). Over the whole year there are 1,949.8 mm of snowfall on average.
The month with the most days of snowfall is January (14.5 days). The months with the fewest days of snowfall are June, July and August (0 days). Over the whole year there are 63.5 days of snowfall on average.
The month with the highest average relative humidity is December (85.3 %). The month with the lowest average relative humidity is May (44 %). The overall average relative humidity over the whole year is 60.2 %.
The month with the longest days, so the most daylight, is June (Average daylight: 17 h). The month with the shortest days, so the least daylight, is December (Average daylight: 7 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is June (Average sunshine: 8.1 h). The month with the least sunshine per day is December (Average sunshine: 1 h). Over the whole year there are 4.8 h of sunlight per day on average.
