Weather and climate in Mount Lehman, British Columbia, Canada: monthly averages and best time for stargazing

Best for stargazingJul, Sep, AugMost clear, dark hours

Warmest monthJulyAverage high 23°C

Coolest monthDecemberAverage low -1°C

Wettest monthNovember222 mm on average

What the weather is like in Mount Lehman

The warmest month in Mount Lehman is July, with average highs of 23°C. The coolest is December, when nights average -1°C. About 1,401 mm of rain and snow falls in a typical year, most in November and least in July.

Skies are clearest in July (50% average cloud cover) and cloudiest in January (81%). Combining cloud with the length of truly dark nights, July, September, August offer the most clear, dark hours for stargazing.

Clear, dark hours per night

2.2 Jan

2.5 Feb

1.7 Mar

1.4 Apr

1.0 May

0.0 Jun

13.1 Jul

2.7 Aug

3.3 Sep

2.7 Oct

2.2 Nov

2.3 Dec

Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.

Monthly averages

Month	High	Low	Precipitation	Cloud cover	Humidity	Wind	Dark hours
January	5°C	-0°C	207 mm	81%	91%	3 km/h	11.5 h
February	6°C	-0°C	113 mm	75%	87%	3 km/h	10.2 h
March	9°C	2°C	157 mm	81%	85%	3 km/h	8.5 h
April	12°C	4°C	97 mm	78%	81%	2 km/h	6.2 h
May	17°C	8°C	71 mm	71%	78%	2 km/h	3.4 h
June	19°C	11°C	56 mm	71%	79%	2 km/h	0.0 h
July	23°C	13°C	30 mm	50%	77%	2 km/h	26.2 h
August	23°C	13°C	36 mm	50%	77%	2 km/h	5.3 h
September	19°C	10°C	77 mm	58%	80%	2 km/h	7.8 h
October	14°C	6°C	153 mm	73%	85%	2 km/h	9.7 h
November	8°C	2°C	222 mm	81%	90%	3 km/h	11.2 h
December	4°C	-1°C	184 mm	81%	91%	3 km/h	11.9 h

Climate averages: NASA POWER, 2001–2025, for the grid area around 49.00, -122.50 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Aurora outlook for Mount Lehman · Sources and methods.