Indeed, Fort Smith holds the distinction of posting the highest recorded temperature in the entire Northwest Territories with a scorching 39.4 C in July 1941. There is very little chance of snow in July, but snow can occur in June and August. Expect rain an average of 10 days a month through the summer. As the days begin to shorten rapidly, the air begins to cool. The rain of summer becomes snow and the thundershowers are no longer to be found.
Autumn is the time of year with the most fog, with an average of four days a month reported.
Winter It may be cold and dark but winter is the best time of year to observe Aurora Borealis and meteorite showers. The sun is above the horizon for just under six hours in December, leaving lots of time to observe the night sky. Cloud cover and not the time of day dictate the warmest and coldest time of day due to very low sun angle even when the sun is at its highest. Indeed, the mercury has been recorded as low as -54 C. Snow of a measurable nature can be expected between 10 and 14 times a month. If we expand the calendar definition of winter to be the period when the average daily temperature is below 0 C, winter becomes a full 200 days in Fort Smith.