Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Mixed for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 6.1h per day, enough for a balanced month. Rainfall averages 30mm, which is relatively low for holiday planning.
Monthly averages
Temp
19°C
Rain
30mm
Sun
6.1h
Weather score
44
Mixed
Cool
Average highs are around 19°C, so pack for cooler days.
Drier
Rainfall averages 30mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.1h per day, enough for a balanced month.
Map
Compare Lake Diefenbaker, Canada with nearby places by weather score, rain, sun, temperature, and swim conditions.
September19°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
September30mm average rain
September sits near Lake Diefenbaker's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and August to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September6.1 hours average sun
September sits close to Lake Diefenbaker's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
September44 weather score
September scores below Lake Diefenbaker's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
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