Red Deer weather in September

In September, Red Deer sees average daytime highs of 17°C and overnight lows near 5°C, with 41 mm of precipitation across 8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 14°C by the end. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Red Deer's 2nd-clearest and 10th-windiest month. For the whole year in context, see Red Deer's year-round climate.

Daytime high: 17°; 4th warmest
Overnight low: 5°; 9th coldest
Precipitation: 41 mm; 8 wet days
Daylight: 12 h 24 min; 6:18 AM – 6:42 PM
Cloud cover: 55%; 2nd clearest
Wind: 11 km/h; 10th windiest
Solar energy: 3.9 kWh/m²
Travel score: 5.5; out of 10

Red Deer is city in Alberta, Canada.

Air quality: Good; PM2.5 7 µg/m³ · 2019
Density: 963/km²; people per km²
Founded: 1882

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Red Deer year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 14°C by the end.

A typical September day in Red Deer reaches about 17°C in the afternoon and slips back to 5°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 24°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	19	19	19	19	18	18	18	18	18	17	17	17	17	17	17	16	16	16	16	16	16	16	15	15	15	15	15	14	14	14
Avg low (°C)	7	7	7	7	6	6	6	6	6	6	5	5	5	5	5	4	4	4	4	4	4	4	3	3	3	3	3	3	2	2

	Avg high (°C)	Avg low (°C)
1	19	7
2	19	7
3	19	7
4	19	7
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	17	6
11	17	5
12	17	5
13	17	5
14	17	5
15	17	5
16	16	4
17	16	4
18	16	4
19	16	4
20	16	4
21	16	4
22	16	4
23	15	3
24	15	3
25	15	3
26	15	3
27	15	3
28	14	3
29	14	2
30	14	2

How September really feels in Red Deer

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 5 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

Red Deer weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-6° / -15°	17	4.9	5.8	8	0.0
Feb	-3° / -13°	11	3.3	4.2	9.5	0.0
Mar	2° / -9°	20	5.8	5.5	11.5	0.0
Apr	9° / -2°	33	7.2	3.9	13.6	2.1
May	16° / 4°	63	10.3	1.8	15.4	4.7
Jun	19° / 8°	91	14.2	0	16.4	5.4
Jul	22° / 10°	83	12.9	0	16	6.3
Aug	21° / 9°	67	10	0	14.5	6.6
Sep	17° / 5°	41	8	0.7	12.4	5.5
Oct	9° / -1°	24	5.8	2.6	10.3	2.1
Nov	1° / -8°	21	5.3	5.2	8.5	0.0
Dec	-5° / -13°	15	4.6	5.3	7.6	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 47%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	56	56	55	55	54	53	52	52	51	51	51	50	50	50	50	51	51	52	52	53	53	53	54	54	53	53	53	53	53	53
Cloudier (%)	44	44	45	45	46	47	48	48	49	49	49	50	50	50	50	49	49	48	48	47	47	47	46	46	47	47	47	47	47	47

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	55	45
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	50	50
16	51	49
17	51	49
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	54	46
24	54	46
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47

Chance of precipitation in September

Any precipitationSnow

Red Deer gets around 41 mm of rain and snow over 8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 27% and peaks near 30% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	28	28	28	29	29	29	30	30	30	30	30	30	30	30	29	28	27	27	26	25	25	24	24	23	23	23	22	22	22	21
Snow chance (%)	1	1	1	1	1	1	1	1	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4	5	5

	Rain chance (%)	Snow chance (%)
1	28	1
2	28	1
3	28	1
4	29	1
5	29	1
6	29	1
7	30	1
8	30	1
9	30	2
10	30	2
11	30	2
12	30	2
13	30	2
14	30	3
15	29	3
16	28	3
17	27	3
18	27	3
19	26	3
20	25	3
21	25	3
22	24	3
23	24	3
24	23	3
25	23	4
26	23	4
27	22	4
28	22	4
29	22	5
30	21	5

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	99	99	99	99	99	99	99	99	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Comfortable (%)	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	10	calm
2	10	calm
3	10	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:52 AM to 6:42 AM, and sunset from 7:18 PM to 6:07 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	13.4	13.4	13.3	13.2	13.2	13.1	13.0	13.0	12.9	12.8	12.7	12.7	12.6	12.5	12.5	12.4	12.3	12.3	12.2	12.1	12.1	12.0	11.9	11.8	11.8	11.7	11.6	11.6	11.5	11.4
Sunrise (AM)	5:52	5:54	5:55	5:57	5:59	6:01	6:02	6:04	6:06	6:07	6:09	6:11	6:12	6:14	6:16	6:18	6:19	6:21	6:23	6:24	6:26	6:28	6:30	6:31	6:33	6:35	6:36	6:38	6:40	6:42
Sunset (PM)	7:18	7:15	7:13	7:11	7:08	7:06	7:03	7:01	6:59	6:56	6:54	6:51	6:49	6:46	6:44	6:42	6:39	6:37	6:34	6:32	6:29	6:27	6:24	6:22	6:19	6:17	6:15	6:12	6:10	6:07

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.4	5:52	7:18
2	13.4	5:54	7:15
3	13.3	5:55	7:13
4	13.2	5:57	7:11
5	13.2	5:59	7:08
6	13.1	6:01	7:06
7	13.0	6:02	7:03
8	13.0	6:04	7:01
9	12.9	6:06	6:59
10	12.8	6:07	6:56
11	12.7	6:09	6:54
12	12.7	6:11	6:51
13	12.6	6:12	6:49
14	12.5	6:14	6:46
15	12.5	6:16	6:44
16	12.4	6:18	6:42
17	12.3	6:19	6:39
18	12.3	6:21	6:37
19	12.2	6:23	6:34
20	12.1	6:24	6:32
21	12.1	6:26	6:29
22	12.0	6:28	6:27
23	11.9	6:30	6:24
24	11.8	6:31	6:22
25	11.8	6:33	6:19
26	11.7	6:35	6:17
27	11.6	6:36	6:15
28	11.6	6:38	6:12
29	11.5	6:40	6:10
30	11.4	6:42	6:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.9 kWh/m².

For context, solar energy here swings from a low near 0.94 kWh/m² to a high of 6.41 kWh/m² in July across the year — September's 3.9 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.7	4.6	4.6	4.5	4.5	4.4	4.3	4.3	4.2	4.2	4.1	4.0	4.0	4.0	3.9	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.5	3.5	3.5	3.4	3.4	3.3	3.3	3.2
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.7	Bright
2	4.6	Bright
3	4.6	Bright
4	4.5	Bright
5	4.5	Bright
6	4.4	Bright
7	4.3	Bright
8	4.3	Bright
9	4.2	Bright
10	4.2	Bright
11	4.1	Bright
12	4.0	Bright
13	4.0	Bright
14	4.0	Moderate
15	3.9	Moderate
16	3.9	Moderate
17	3.8	Moderate
18	3.8	Moderate
19	3.7	Moderate
20	3.7	Moderate
21	3.6	Moderate
22	3.6	Moderate
23	3.5	Moderate
24	3.5	Moderate
25	3.5	Moderate
26	3.4	Moderate
27	3.4	Moderate
28	3.3	Moderate
29	3.3	Moderate
30	3.2	Moderate

Planning a trip in September

Is September a good time to visit Red Deer?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.5

Sightseeing

3rd-best month of the year

1.2

Beach & pool

4th-best month of the year

September is a reasonable time to visit Red Deer for sightseeing.

What to pack for Red Deer in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Red Deer sees daytime highs around 17°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 8 days see rain.

a warm layerrain gear

UV index in Red Deer in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Red Deer peaks around July 15 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	5	6	7	5	3	2	1	1
Level	Low	Low	Moderate	Moderate	High	High	Very high	Moderate	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	5	High
Jun	6	High
Jul	7	Very high
Aug	5	Moderate
Sep	3	Moderate
Oct	2	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Red Deer?

Red Deer sits at 52.3°N, 113.8°W, 856 m above sea level, in Canada. The nearest listed city is Sylvan Lake, 20 km away.

Topography around Red Deer

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Red Deer.

Within 3 km, the terrain around Red Deer has only modest variations in elevation — a maximum elevation change of 60 m around an average of 877 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 247 m; within 80 km, significant variations in elevation — a maximum elevation change of 546 m.

The land around Red Deer is covered by artificial surfaces (50%), trees (26%) and grassland (20%) within 3 km, cropland (48%) and grassland (30%) within 16 km, and cropland (44%) and grassland (39%) within 80 km.

3 km

60 m

artificial surfaces 50%

16 km

247 m

cropland 48%

80 km

546 m

cropland 44%

treesgrasslandcroplandartificial surfacesbare terrainwater

← August Red Deer year-round climate October →Best places to visit in September

September weather nearby: Sylvan Lake 20 km · Camrose 106 km · Airdrie 109 km · Leduc 112 km · Coventry Hills 123 km · Evanston 125 km · Panorama Hills 125 km · Saddle Ridge 127 km

Canada travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 83% of US; price level, 2025
GDP per capita: $55,698; 2025
Happiness: 6.7 / 10; World Happiness, 2025
Safe drinking water: 97%; of population, 2024
Homicide rate: 2; per 100k, 2023
Road deaths: 5.3; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Red Deer (52.2668°, -113.802°, elevation 856 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	19	7
2	19	7
3	19	7
4	19	7
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	17	6
11	17	5
12	17	5
13	17	5
14	17	5
15	17	5
16	16	4
17	16	4
18	16	4
19	16	4
20	16	4
21	16	4
22	16	4
23	15	3
24	15	3
25	15	3
26	15	3
27	15	3
28	14	3
29	14	2
30	14	2

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	55	45
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	50	50
16	51	49
17	51	49
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	54	46
24	54	46
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47

	Rain chance (%)	Snow chance (%)
1	28	1
2	28	1
3	28	1
4	29	1
5	29	1
6	29	1
7	30	1
8	30	1
9	30	2
10	30	2
11	30	2
12	30	2
13	30	2
14	30	3
15	29	3
16	28	3
17	27	3
18	27	3
19	26	3
20	25	3
21	25	3
22	24	3
23	24	3
24	23	3
25	23	4
26	23	4
27	22	4
28	22	4
29	22	5
30	21	5

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°C)	Avg low (°C)
1	19	7
2	19	7
3	19	7
4	19	7
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	17	6
11	17	5
12	17	5
13	17	5
14	17	5
15	17	5
16	16	4
17	16	4
18	16	4
19	16	4
20	16	4
21	16	4
22	16	4
23	15	3
24	15	3
25	15	3
26	15	3
27	15	3
28	14	3
29	14	2
30	14	2

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	55	45
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	50	50
16	51	49
17	51	49
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	54	46
24	54	46
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47

	Rain chance (%)	Snow chance (%)
1	28	1
2	28	1
3	28	1
4	29	1
5	29	1
6	29	1
7	30	1
8	30	1
9	30	2
10	30	2
11	30	2
12	30	2
13	30	2
14	30	3
15	29	3
16	28	3
17	27	3
18	27	3
19	26	3
20	25	3
21	25	3
22	24	3
23	24	3
24	23	3
25	23	4
26	23	4
27	22	4
28	22	4
29	22	5
30	21	5

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0

	Avg high (°C)	Avg low (°C)
1	19	7
2	19	7
3	19	7
4	19	7
5	18	6
6	18	6
7	18	6
8	18	6
9	18	6
10	17	6
11	17	5
12	17	5
13	17	5
14	17	5
15	17	5
16	16	4
17	16	4
18	16	4
19	16	4
20	16	4
21	16	4
22	16	4
23	15	3
24	15	3
25	15	3
26	15	3
27	15	3
28	14	3
29	14	2
30	14	2

	Clearer (%)	Cloudier (%)
1	56	44
2	56	44
3	55	45
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	50	50
13	50	50
14	50	50
15	50	50
16	51	49
17	51	49
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	54	46
24	54	46
25	53	47
26	53	47
27	53	47
28	53	47
29	53	47
30	53	47

	Rain chance (%)	Snow chance (%)
1	28	1
2	28	1
3	28	1
4	29	1
5	29	1
6	29	1
7	30	1
8	30	1
9	30	2
10	30	2
11	30	2
12	30	2
13	30	2
14	30	3
15	29	3
16	28	3
17	27	3
18	27	3
19	26	3
20	25	3
21	25	3
22	24	3
23	24	3
24	23	3
25	23	4
26	23	4
27	22	4
28	22	4
29	22	5
30	21	5

	Dry (%)	Comfortable (%)
1	99	1
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0