WeatherJourney.com

Red Deer weather by month: averages, rainfall & climate trends

Seasons run to extremes in Red Deer: monthly means span 28.0°C between the coldest month and the warmest. The heavier rain months run from May to September. Red Deer weather by month: average temperatures, rainfall, extremes and how the climate has changed since 1940.

Today vs average

−5.5°Chigh well below average

3° / −4°Today
9° / −1°Average
see today in detail →

How it's changed

+0.7°Caverage temperature, 2016–2025 vs 1940–1949average temperature vs 1940–49180frost days a year now (2016–2025) · 182 in the 1940sfrost days a year · 182 in the 1940s6days above 30°C a year now (2016–2025) · 2 in the 1940sdays above 30°C · 2 in the 1940s+0.7°C vs the 1940s · see how it's changed →
Weather by montha typical year, averaged over the full recordJanuary, rain 23 mmhigh −6°low −15°February, rain 18 mmhigh −3°low −13°March, rain 24 mmhigh 2°low −8°April, rain 36 mmhigh 11°low −1°May, rain 67 mmhigh 17°low 4°June, rain 91 mmhigh 20°low 9°July, rain 86 mmhigh 23°low 11°August, rain 73 mmhigh 23°low 10°September, rain 47 mmhigh 18°low 6°October, rain 27 mmhigh 11°low 0°November, rain 22 mmhigh 1°low −7°December, rain 21 mmhigh −4°low −13°wettest month June, 91 mm · 535 mm a yearsee month by month →

Right now

What it's doing today vs the historical average for this date.
Mostly clear

Right now

−2.9°

−8°feels like
83%humidity
−5°dew point
18 km/hfrom SE
UV index0.0
sunrise08:20sunset18:17day length9h 57m
TodayOvercast3°−4°
TueOvercast2°−2°
WedOvercast0°−4°
ThuOvercast−2°−5°
FriOvercast−1°−5°
SatOvercast1°−3°
SunMostly clear2°−3°

On this date: October 26

Today (forecast)
3° / −4°
Average for October 26
9° / −1°

High well below average · −5.5°C

  • Highest since 1940: 17.7° · 2003
  • Lowest since 1940: −18.0° · 2023
  • One year ago: 12° / 4°

Every October 26 in history, coldest to hottest

▲ Daily highs▼ Daily lows

Dots show daily highs (top) and lows (bottom) for each October 26 on record (n = 87). Outlined dots are today's forecast.

Area we sample

Each city's history comes from one ERA5 grid cell, about 28 km across, shown by the dashed box. Near mountains or coasts, conditions can vary across the cell.

Location & data

Historical weather for Red Deer is sampled from the ECMWF ERA5 reanalysis at 52.27°N, 113.80°W, with daily records since 1940.

Coordinates
52.27°N, 113.80°W
Time zone
America/Edmonton
Period
1940–2026
Data source
ERA5 (ECMWF)

Last 30 days

15 of the last 31 days were warmer than the historical average for that date. Average difference: 0.0°C.

Each bar is one day, from morning low to afternoon high. Warm-colored bars are days whose mean ran above average; cool bars ran below. The dot inside the bar is the daily mean. The shaded band is the typical 10–90% range expected for that date. Average = the day's mean temperature averaged across every year of record (1940–2026) for that calendar date.

This date over the years

One dot per year, showing the mean temperature on this calendar date. Dots are warmer or cooler than the long-term average (dashed line); the shaded band is the typical 10–90% range, and the highlighted dot is today's forecast. Based on ERA5 reanalysis: modelled estimates, not station readings.

Weather by month

Average temperatures and rainfall for each month: a typical year, from the full record.

Climate overview

July brings the year's peak warmth, with afternoons typically reaching 23.3°C and nights around 11.1°C. At the other extreme, January brings afternoon highs of about −6.0°C and typical overnight lows of −15.1°C. Around 180 days a year dip below freezing.

Red Deer picks up roughly 535 mm a year, with a peak of 91 mm in June and as little as 18 mm in February.

The record here starts in 1940, and since then the annual mean in Red Deer has climbed 0.7°C from the first ten years to the last ten. You can follow the shift year by year in the charts below.

Climate graph (climograph)

July is the warmest month, January the coolest: a yearly swing of 28°C. Wettest month: June (~91 mm). Whole year averages ~535 mm of rain.

Bars = average monthly rainfall (right axis). Lines = average daily high and low (left axis). Average = each month's value averaged across every year of record (1940–2026).

Rainy days by month

About 67 rainy days a year: most in June (~10), fewest in February (~3).

Bars = average number of days with ≥ 2 mm per month. Hover for the monthly rainfall total.

Monthly wind

Average daily peak wind at 10 m, by month.

Monthly solar energy

Average daily incoming solar energy in megajoules per square metre: the record's own proxy for how sunny the month is.

Red Deer month by month: what to expect

Typical conditions for each month, averaged across the full record (since 1940). Daylight is the time from sunrise to sunset. Highest and Lowest are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.

MonthAvg highAvg lowRainRainy daysDaylightHighestLowest
January−6.0°−15.1°23 mm38.0 h10.1° (2012)−42.2° (1972)
February−2.7°−12.9°18 mm39.6 h16.2° (1968)−39.7° (1947)
March2.4°−8.2°24 mm411.5 h23.0° (2004)−35.6° (2014)
April10.8°−1.3°36 mm513.6 h27.9° (1984)−30.8° (1954)
May17.2°4.4°67 mm815.5 h31.9° (2025)−13.8° (1954)
June20.4°8.8°91 mm1016.5 h34.0° (2021)−0.9° (1969)
July23.3°11.1°86 mm916.1 h35.6° (1941)2.8° (2009)
August22.8°10.2°73 mm814.5 h35.1° (2018)−1.7° (1992)
September18.1°5.7°47 mm612.4 h33.2° (2009)−12.7° (1951)
October11.3°0.3°27 mm410.3 h26.8° (1980)−23.4° (1991)
November1.2°−7.3°22 mm38.4 h20.8° (2016)−33.8° (1985)
December−4.4°−13.1°21 mm37.5 h12.5° (1999)−40.4° (1977)

How it's changed

Year-by-year signals from 1940 to today.

Climate stripes

Annual mean shifted from 1940–1949 to 2016–2025 by +0.7°C.

Each vertical stripe is one year. Color encodes how much that year's annual mean differed from the long-term average. Average = each year's annual mean compared to the average of all years (1940–2026). cooler ← → warmer

Annual mean temperature

Long-term trend: +0.14°C per decade.

One point per year, showing the temperature averaged across the whole year. The dashed line is the least-squares long-term trend. Based on ERA5 reanalysis: modelled estimates, not station readings.

Seasonal warming

Dec–Feb is warming fastest: +0.30°C per decade.

Each faint line is one three-month period's average per year; the bold dashed line is its long-term trend. Different parts of the year often warm at different rates. Based on ERA5 reanalysis: modelled estimates, not station readings.

Hot days vs frost days

Days ≥ 30°C per year: 2.3 early in the record → 6.4 recently. Frost days: 182 → 180.

Thin lines are raw yearly counts; thick lines are the smoothed trend that removes year-to-year noise. The hot-day threshold is auto-picked per city so the line actually moves. Average = a centered 5-year rolling average to smooth weather noise.

Yearly hot & cold extremes

Hottest day since 1940 in 1941, coldest in 1972: 35.6°C / −42.2°C.

One point per year: the single hottest and coldest day recorded that year.

Annual rainfall

~535 mm/year on average. Last decade: −1% vs that average. Long-term trend: +2 mm per decade.

One bar per year of total rainfall. Dashed line is the long-term average. Average = the average annual rainfall across every year of record (1940–2026).

Day-by-day grid

Each tiny square is one calendar day across the full record, about 30,000 days per city. Use the mode switch above the chart: Anomaly colors each day by how far it ran from the historical average for that date (red = warmer, blue = cooler), Daily mean temp shows the absolute mean temperature for the day (useful to see seasons and heatwaves), and Precipitation shows daily rainfall (useful to spot wet/dry seasons and droughts). Average = the long-term average for that calendar date (1940–2026).

Frequently asked questions about Red Deer

Which is the warmest month in Red Deer?
On long-term average, the warmest month in Red Deer is July (mean daily temperature of about 16.8°C) and the coolest is January (about −11.2°C).
How does today's temperature in Red Deer compare to the historical average?
On October 26, 2026, Red Deer is forecast to reach a high of 3.1°C and a low of −4.2°C. The long-term average for this date (the full record since 1940) is a high of 8.6°C and a low of −1.5°C, so today's high is 5.5°C cooler than that average.
How much has Red Deer warmed since 1940?
Comparing the first decade of the record (1940–1949) with the most recent (2016–2025), the annual mean temperature in Red Deer is about 0.7°C warmer.
How much does it rain in Red Deer?
Red Deer receives about 535 mm of precipitation per year on long-term average, with June typically the wettest month.
What is the average temperature in Red Deer?
Over the full record (since 1940), the annual mean temperature in Red Deer is about 3.4°C. The warmest month is July and the coolest is January.
What are the average temperatures in Red Deer by month?
Average daily highs and lows for each month in Red Deer (°C, full record since 1940): January −6°/−15°, February −3°/−13°, March 2°/−8°, April 11°/−1°, May 17°/4°, June 20°/9°, July 23°/11°, August 23°/10°, September 18°/6°, October 11°/0°, November 1°/−7°, December −4°/−13°.
What is the weather like in Red Deer in summer?
June to August is summer in Red Deer, and it is pleasantly warm. Expect 20–23°C by day and 9–11°C at night, with July the warmest month. Rain falls on about 9 days a month, adding up to around 83 mm. No season is wetter.
What is the weather like in Red Deer in winter?
In winter, December through February, Red Deer is cold, with afternoons close to freezing. Daytime highs sit at −6 to −3°C and nights at −15 to −13°C; January is the coldest month. Snow is steady at around 21 mm of precipitation a month, spread over roughly 3 days. No season is drier.
What is the weather like in Red Deer in spring?
Spring in Red Deer (March to May) is on the cool side. It warms from 2°C by day and −8°C at night in March to 17°C and 4°C in May. Rain and snow rise from 24 mm on 4 days in March to 67 mm on 8 days in May.
What is the weather like in Red Deer in autumn?
September to November is autumn in Red Deer, and it is on the cool side. September still brings 18°C afternoons and 6°C nights, November only 1°C and −7°C. Rain and snow fall off from 47 mm on 6 days in September to 22 mm on 3 days in November.
How many days a year does it rain in Red Deer?
On long-term average, Red Deer has about 67 days a year with at least 2 mm of rain or snow. The annual total is roughly 535 mm.

Weather in nearby cities