Photo: Johny-le-cowboy · CC BY-SA 3.0

Climate in Dolbeau-Mistassini · ECCC 1991–2020 normals

Dolbeau-Mistassini has some of the coldest winter nights among Canadian towns

Sunny July days climb to about 23.9°C. Seasons differ by 47°C, from the coldest nights to the warmest afternoons. Its July afternoons stay fresher than in 70% of Canadian towns. The heating season runs October to May: each of those months averages under 10°C.

July afternoons: cooler than 70% of Canadian towns

January nights: colder than almost every Canadian town

Rain and snow a year: wetter than 56% of Canadian towns

No ECCC station in Dolbeau-Mistassini has 1991–2020 normals; the page reads Normandin, 24 km west, instead.

July high

23.9°C

Typical Canadian town 25.5°C

January low

−23.4°C

Typical Canadian town −13.5°C

Rain & snow a year

911 mm

Typical Canadian town 883 mm

Snowfall a year

271 cm

Typical Canadian town 141 cm

Frost days

203

a year at 0°C or below

A year in Dolbeau-Mistassini at a glance

Each month’s typical high and low, in °C.

Jan−11°C−23°CColdest nights

Feb−9°C−22°C

Mar−2°C−15°C

Apr6°C−5°C

May16°C2°C

Jun22°C8°C

Jul24°C11°CWarmestWettest

Aug23°C10°C

Sep18°C5°C

Oct10°C0°C

Nov now2°C−7°C

Dec−7°C−17°CSnowiest

What stands out about Dolbeau-Mistassini’s climate

Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.

A wider year than almost every Canadian townFrom January nights to July afternoons, the year spans 47.3°C.Colder than almost every Canadian townJanuary nights average −23.4°C, the coldest of the year. 507th mildest of 513 towns of 2,500+ in Quebec.Snowier than 89% of Canadian townsAbout 271 cm of snow falls in a year, most of it in December.

A normal year

What a year in Dolbeau-Mistassini feels like

Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.

Winter

−9°C / −21°C

166 mm, with 147 cm of snow

Spring

7°C / −6°C

193 mm, with 77 cm of snow

Summer

23°C / 10°C

302 mm of rain and snow, the wettest season

Autumn

10°C / 0°C

250 mm, with 47 cm of snow

−30°

−20°

−10°

0°

10°

20°

30°

−11°C−23°C

−9°C−22°C

−2°C−15°C

6°C−5°C

16°C2°C

22°C8°C

24°C11°C

23°C10°C

18°C5°C

10°C0°C

2°C−7°C

−7°C−17°C

JanFebMarAprMayJunJulAugSepOctNovDec

Best months to be outsideJunJulAugHighs of 17–27°C and nights of 8°C or more

Frost & warm days

About 203 frosts and 88 warm days a year

From September to May frost is routine, and in January it comes on almost every night. Some 61 nights a year drop under −20°C.

203

Frost days a year (0°C or below)

More frosts than 94% of Canadian towns

110

Days that stay below 0°C

Nights a year below −20°C

Days a year above 20°C

Days a year above 30°C

Frost days by month

Average days at 0°C or below

JFMAMJJASOND

Days above 20°C by month

Average days

JFMAMJJASOND

Rain & snow

Rain and melted snow: about 911 mm a year

July brings the most rain and snow; February, the least. About 124 days a year bring 1 mm or more.

911 mm

Rain and snow a year

Wetter than 56% of Canadian towns

645 mm

Of it as rain alone (71%)

112 mm

July, the wettest month

45 mm

February, the driest month

Rain and snow by month

Millimetres

112 mm

JFMAMJJASOND

Rain alone by month

Millimetres

112 mm

JFMAMJJASOND

Normandin publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Roberval, 40 km away.

Snow

271 cm of snow in a typical year

The snow season runs October to May; December brings the most, about 55 cm.

271 cm

Snowfall a year

Snowier than 89% of Canadian towns

Days a year with 0.2 cm of snow or more

Snowfall by month

Centimetres

55 cm

JFMAMJJASOND

Heating

Heating a home in Dolbeau-Mistassini

88% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.

6,030 heating degree days (below 18°C)a year, 1991–2020

1,444 growing degree days (above 5°C)a year, 1991–2020

Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. In heating terms, homes need more heating than 98% of Canadian towns.

Living here

Living with Dolbeau-Mistassini’s climate

Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.

Get outside

Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul and Aug.

Parks & trails →

Wind chill

Wind chill falls below −20 on about 90 days a year: cover skin and dress in layers.

Humidex

Count on some 23 humid days a year with the humidex past 30.

Storms and extremes

The normals describe a typical year, not its worst days; the hazards page covers Dolbeau-Mistassini’s.

Flood & hazards →

Weather station

ECCC’s normals location: Normandin

Normandin is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.

Distance from the town	24 km west
Station altitude	137 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Precipitation from	Roberval, 40 km
Coldest reading, 1991–2020	−46.6°C
Hottest reading, 1991–2020	36.5°C
Average wind	13.6 km/h on average, most often from the north-west
Next-nearest location	Roberval, 40 km

Compared with other towns

How Dolbeau-Mistassini compares

Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.

July afternoons23.9°C

Dolbeau-MistassiniMedian Canadian town

18°C20°C22°C24°C26°C28°C

Cooler than 70% of Canadian towns

January nights−23.4°C

Dolbeau-MistassiniMedian Canadian town

−30°C−25°C−20°C−15°C−10°C−5°C

Colder than almost every Canadian town507th mildest of 513 towns of 2,500+ in Quebec

Rain and snow a year911 mm

Dolbeau-MistassiniMedian Canadian town

05001,0001,5002,000

Wetter than 56% of Canadian towns

Snowfall a year271 cm

Dolbeau-MistassiniMedian Canadian town

100200300400

Snowier than 89% of Canadian towns

Next door

Nearby towns’ climate

Places around Dolbeau-Mistassini whose figures come from another normals location. Dolbeau-Mistassini has no close neighbour with figures; the nearest is 29 km away.

Town	July high	January low	Rain & snow
Dolbeau-Mistassini Normandin	23.9°C	−23.4°C	911 mm
Saint-Félicien 29 km · Roberval	23.7°C about the same	−20.8°C 2.6°C milder	911 mm

Month by month

Dolbeau-Mistassini weather by month

Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.

Month	High	Low	Mean	Rain & snow	Snow
January	−10.9°C	−23.4°C	−17.2°C	55 mm	47 cm
February	−8.5°C	−22.4°C	−15.4°C	45 mm	44 cm
March	−1.7°C	−15.4°C	−8.4°C	57 mm	45 cm
April	6.2°C	−5.0°C	0.6°C	64 mm	29 cm
May	16.3°C	2.4°C	9.4°C	71 mm	4 cm
June	21.7°C	8.0°C	14.9°C	87 mm	0 cm
July	23.9°C	11.1°C	17.5°C	112 mm	0 cm
August	22.6°C	9.8°C	16.2°C	104 mm	0 cm
September	17.7°C	5.3°C	11.5°C	99 mm	under 1 cm
October	9.6°C	−0.1°C	4.7°C	81 mm	8 cm
November	1.7°C	−6.6°C	−2.5°C	71 mm	39 cm
December	−6.5°C	−16.9°C	−11.7°C	66 mm	55 cm
Year	7.7°C	−4.4°C	1.6°C	911 mm	271 cm

Year to year

The most changeable month: February, give or take 3.3°C; the steadiest, August

January has the widest record range, −46.6°C in 2014 to 10.4°C in 1996; the tick on each bar is the month’s normal.

−50°

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Dolbeau-Mistassini’s numbers come from

Averages over 30 years, not a forecast.

Normals: the 1991–2020 Canadian Climate Normals at Normandin, the closest ECCC location with twelve months of temperature normals.
Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.

Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada

Questions about Dolbeau-Mistassini’s climate

How warm does Dolbeau-Mistassini get in summer?

Expect highs near 23.9°C in July, the hottest month on average.

How cold does Dolbeau-Mistassini get in winter?

Midwinter means January, when a typical night reaches −23.4°C.

How much rain and snow does Dolbeau-Mistassini get?

The yearly total is about 911 mm. July gets 112 mm, the most of any month; February gets 45 mm, the least.

Are these figures for Dolbeau-Mistassini itself?

The figures are ECCC’s for Normandin; Dolbeau-Mistassini has no normals station.

Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Dolbeau-Mistassini →

Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).