Chilliwack July Weather – After Mid Month, It Felt Like Summer!

Chilliwack (Roger Pannett, Environment Canada) – Canada Day was picture perfect then a few days of rain.

By mid-month, a typical July evolved and by the last week, record or near record temperatures were recorded.

Until mid-month a re-occurring trough of low pressure resulted in 7 days of showery conditions. After mid month a strong ridge of high pressure developed with associated clear, sunny skies and rising temperatures!

Six high temperature records were observed:-

Date. New Record. Previous Record.

July 26^th . High min 20.0°C (+8.7°C). 19.0°C in 2009

July 26^th . High mean 28.9°C (+10.6°C). 25.0°C in 1971+2018

July 26^th High max 37.8°C( +12.6°C). 33.9°C in 1971

July 27^th High min 20.6°C (+9.2°C) 18.3°C in 1958

July 28^th “ “ 19.7°C (+8.2°C) 19.4°C in 1958

July 29^th “ “ 19.7°C( +8.5°C) 18.4°C in 2009

There were 9 hot days, with temperatures exceeding 30.0°C, compared to the average 3 hot days with a + or – 2.7 day deviation.

Temperature extremes for the month were the record 37.8°C (+12.6°C ) with a relative humidity of 23% on July 26^th and a mild overnight minimum of 12.0°C on July 19^th. The all time July record max of 38.3°C on July 29^th ,2009 remains.

The month concluded with a 7 day heatwave with temperatures >32.0°C, equaling the extended heatwaves observed during the summers of 2004 & 2009.

(July 31^st ,35.5°C (+10.2°C). Record 35.6°C in 1965 remains.)

With a mean temperature at 21.62°C (3.47°C above normal) it was the 11^th consecutive July with mean temperatures above normal, the past ten in excess of the standard deviation + or – 1.2°C, a warming trend never previously observed since Chilliwack records commenced in 1895.

Hottest July’s on record, based on Mean temperatures, are as follows:-

July 2015 at 22.17°C

July 2018 at 22.09°C

July 2021 at 21.84°C

July 1958 at 21.70°C

July 2022 at 21.62°C

Very high UV. levels were reported on 18 days, peaking at a 9 rating.

Total rainfall was 30.8 % below normal with the month concluding with a 14 day continuing drought.

The City of Chilliwack 2022 precipitation total to date is 801.7 mm on 119 days compared to the average of 983 mm on 97 days.

Data recorded by Roger Pannett, Volunteer Weather Observer for Environment Canada at Chilliwack, B.C.

Variable	July 2022	30 Year Average
Mean Maximum	27.83 °C	24.3C
Mean Minimum	15.42 °C	12.0°C
Mean Temperature	21.62 C	18.15 C
Rainfall	31.8 mm	46.0 mm
Snowfall	0.0 cm	0.0 cm
Total Precipitation	31.8 mm	46.0 mm
Days of Rain	7 days	6 days
Days of Snow
Total Days of Precipitation	7 days	6 days
Frosts
Relative humidity average	64.9 %	.