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Squamish weather update: Fall is coming, but sunny days ahead this week

As we approach the first day of fall on Sept. 23, Squamish is already experiencing the cool embrace of autumn. However, don't put away your sunglasses just yet, as meteorologist Jason Ross predicts a sunny week ahead.
Alex Ratson/heli
The average high on Sept. 18 in Squamish is 20.5 C, according to Environment Canada data.

Though the first day of fall officially arrives on Saturday, Sept. 23, it is already starting to feel a little more like autumn in Squamish. 

But we have a few lovely days this week to look forward to.

According to Squamish meteorologist Jason Ross, a ridge of high pressure just off the B.C. coast will bring mainly sunshine across the Sea to Sky this afternoon (Sept. 18) with a high of 18 C.

The Weatherhood station on The Squamish Chief roof downtown says it is 14 C at 10: 15 a.m. 

Sunset will be at 7: 22 p.m. Sept. 18.

It will be chilly overnight, dipping to 11 C. 

The average high on Sept. 18 in Squamish is 20.5 C, according to Environment Canada data.

The average low is 8.5 C.

Ross said the next frontal system with showers will slide down the coast on Tuesday afternoon or evening. 

Sunrise will be 6:52 a.m. on Sept. 19.

Weatherhood predicts 13 C Tuesday, dipping to 9 C overnight. 

Ross said a ridge of high pressure will rebuild from the Pacific on Wednesday with a return to drier and warmer conditions. 

Weatherhood forecasts 18 C on Wednesday, dropping to 9 C overnight. 

Thursday will see 19 C dipping to 14 C overnight. 

Campfire to warm up?

While it may be getting chillier, remember that a campfire ban remains in effect in Squamish and the corridor. 

The prohibition will be in effect until Tuesday, Oct. 31, 2023, or until the order is rescinded.

Water use

The District of Squamish is at Stage 2 of its water conservation program. 

This means that folks have one day when they can water a lawn with a sprinkler, in either the morning or evening, based on their address. 

Find out which day you can water on the District’s website.

On this day

The warmest (1982 to 2022) it has been on Sept. 18 was 26.5 C in 2022, according to Environment Canada. 

The lowest temperature we have seen on this day was 3.5 C in 1989.

The greatest precipitation on this day was 26.8 mm in 2021.

For up-to-the-minute Squamish weather, go to our Weatherhood page.

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