Grande Prairie weather in September

In September, Grande Prairie sees average daytime highs of 16°C and overnight lows near 5°C, with 40 mm of precipitation across 7.8 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 28% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Grande Prairie's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Grande Prairie's year-round climate.

Daytime high: 16°; 5th warmest
Overnight low: 5°; 9th coldest
Precipitation: 40 mm; 7.8 wet days
Daylight: 12 h 24 min; 6:36 AM – 7:03 PM
Cloud cover: 60%; 3rd clearest
Wind: 12 km/h; 2nd windiest
Solar energy: 3.5 kWh/m²
Travel score: 5.2; out of 10

Grande Prairie is city in Alberta, Canada.

Air quality: Good; PM2.5 7 µg/m³ · 2019
Density: 1,130/km²; people per km²
Founded: 1914

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

← August Grande Prairie 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 18°C in the first days to 14°C by the end.

A typical September day in Grande Prairie reaches about 16°C in the afternoon and slips back to 5°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 23°C. Set against its neighbours, September runs about 5°C cooler than August and about 8°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)	18	18	18	18	18	18	17	17	17	17	17	17	16	16	16	16	16	16	16	15	15	15	15	15	15	14	14	14	14	13
Avg low (°C)	7	7	7	7	7	7	6	6	6	6	6	6	5	5	5	5	5	5	5	4	4	4	4	4	4	3	3	3	3	3

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

How September really feels in Grande Prairie

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 3 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.

Grande Prairie weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-8° / -15°	28	7.7	8	7.5	0.0
Feb	-5° / -13°	16	4.8	5.7	9.2	0.0
Mar	0° / -9°	21	6.1	5.9	11.4	0.0
Apr	9° / -2°	25	6.2	2.8	13.8	2.0
May	16° / 4°	40	7.5	0.7	15.8	5.2
Jun	20° / 9°	73	11.3	0	17	5.9
Jul	22° / 11°	77	11.8	0	16.6	6.4
Aug	21° / 10°	47	8.9	0	14.8	6.7
Sep	16° / 5°	40	7.8	0.4	12.5	5.2
Oct	8° / -1°	35	7.3	2.8	10.2	1.6
Nov	-2° / -9°	31	8.3	7.1	8.1	0.0
Dec	-7° / -14°	22	6.3	6.5	7	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 54%.

	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 (%)	47	45	45	45	44	43	43	43	44	44	44	43	45	45	46	46	46	46	46	46	47	48	47	48	48	48	48	47	47	47
Cloudier (%)	53	55	55	55	56	57	57	57	56	56	56	57	55	55	54	54	54	54	54	54	53	52	53	52	52	52	52	53	53	53

	Clearer (%)	Cloudier (%)
1	47	53
2	45	55
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	43	57
9	44	56
10	44	56
11	44	56
12	43	57
13	45	55
14	45	55
15	46	54
16	46	54
17	46	54
18	46	54
19	46	54
20	46	54
21	47	53
22	48	52
23	47	53
24	48	52
25	48	52
26	48	52
27	48	52
28	47	53
29	47	53
30	47	53

Chance of precipitation in September

Any precipitationSnow

Grande Prairie gets around 40 mm of rain and snow over 7.8 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 26% and peaks near 29% on the wettest days, and about 0 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 (%)	29	29	29	29	29	29	29	29	29	29	28	28	28	27	27	26	26	25	25	24	24	24	23	23	22	22	22	22	22	22
Snow chance (%)	0	0	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	3	3

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

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 (%)	98	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	100	100	100
Comfortable (%)	2	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	0	0	0

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	100	0
10	100	0
11	100	0
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 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 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)	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 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 132 minutes over September. Sunrise moves from 6:07 AM to 7:04 AM, and sunset from 7:43 PM to 6:25 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)	13.6	13.5	13.4	13.4	13.3	13.2	13.1	13.1	13.0	12.9	12.8	12.8	12.7	12.6	12.5	12.4	12.4	12.3	12.2	12.1	12.1	12.0	11.9	11.8	11.7	11.7	11.6	11.5	11.4	11.4
Sunrise (AM)	6:07	6:09	6:11	6:13	6:15	6:17	6:19	6:21	6:23	6:25	6:27	6:28	6:30	6:32	6:34	6:36	6:38	6:40	6:42	6:44	6:46	6:48	6:50	6:52	6:54	6:56	6:58	7:00	7:02	7:04
Sunset (PM)	7:43	7:40	7:37	7:35	7:32	7:30	7:27	7:24	7:22	7:19	7:16	7:14	7:11	7:08	7:06	7:03	7:00	6:57	6:55	6:52	6:49	6:47	6:44	6:41	6:39	6:36	6:33	6:31	6:28	6:25

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.6	6:07	7:43
2	13.5	6:09	7:40
3	13.4	6:11	7:37
4	13.4	6:13	7:35
5	13.3	6:15	7:32
6	13.2	6:17	7:30
7	13.1	6:19	7:27
8	13.1	6:21	7:24
9	13.0	6:23	7:22
10	12.9	6:25	7:19
11	12.8	6:27	7:16
12	12.8	6:28	7:14
13	12.7	6:30	7:11
14	12.6	6:32	7:08
15	12.5	6:34	7:06
16	12.4	6:36	7:03
17	12.4	6:38	7:00
18	12.3	6:40	6:57
19	12.2	6:42	6:55
20	12.1	6:44	6:52
21	12.1	6:46	6:49
22	12.0	6:48	6:47
23	11.9	6:50	6:44
24	11.8	6:52	6:41
25	11.7	6:54	6:39
26	11.7	6:56	6:36
27	11.6	6:58	6:33
28	11.5	7:00	6:31
29	11.4	7:02	6:28
30	11.4	7:04	6:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.5 kWh/m².

For context, solar energy here swings from a low near 0.65 kWh/m² to a high of 6.34 kWh/m² in June across the year — September's 3.5 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)	4.2	4.2	4.1	4.0	4.0	3.9	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.6	3.5	3.5	3.4	3.4	3.3	3.3	3.3	3.2	3.2	3.1	3.1	3.0	3.0	2.9	2.9	2.8
Level	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.2	Bright
3	4.1	Bright
4	4.0	Bright
5	4.0	Moderate
6	3.9	Moderate
7	3.9	Moderate
8	3.8	Moderate
9	3.8	Moderate
10	3.7	Moderate
11	3.7	Moderate
12	3.6	Moderate
13	3.6	Moderate
14	3.6	Moderate
15	3.5	Moderate
16	3.5	Moderate
17	3.4	Moderate
18	3.4	Moderate
19	3.3	Moderate
20	3.3	Moderate
21	3.3	Moderate
22	3.2	Moderate
23	3.2	Moderate
24	3.1	Moderate
25	3.1	Moderate
26	3.0	Moderate
27	3.0	Moderate
28	2.9	Moderate
29	2.9	Moderate
30	2.8	Moderate

Planning a trip in September

Is September a good time to visit Grande Prairie?

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

5.2

Sightseeing

4th-best month of the year

0.9

Beach & pool

5th-best month of the year

September is a reasonable time to visit Grande Prairie for sightseeing.

What to pack for Grande Prairie in September

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

In September, Grande Prairie sees daytime highs around 16°C and nights near 5°C. Worth packing: a warm layer. About 8 days see rain.

a warm layer

UV index in Grande Prairie 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 Grande Prairie peaks around July 15 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 0 (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	2	3	5	6	7	5	3	2	1	0
Level	Low	Low	Moderate	Moderate	Moderate	High	Very high	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	2	Moderate
Apr	3	Moderate
May	5	Moderate
Jun	6	High
Jul	7	Very high
Aug	5	Moderate
Sep	3	Moderate
Oct	2	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Grande Prairie?

Grande Prairie sits at 55.2°N, 118.8°W, 653 m above sea level, in Canada. The nearest listed city is Fort St. John, 176 km away.

Topography around Grande Prairie

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

Within 3 km, the terrain around Grande Prairie has only modest variations in elevation — a maximum elevation change of 57 m around an average of 662 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 273 m; within 80 km, large variations in elevation — a maximum elevation change of 1,036 m.

The land around Grande Prairie is covered by artificial surfaces (55%) within 3 km, trees (33%), cropland (32%) and grassland (20%) within 16 km, and trees (65%) and cropland (21%) within 80 km.

3 km

57 m

artificial surfaces 55%

16 km

273 m

trees 33%

80 km

1,036 m

trees 65%

treesgrasslandcroplandartificial surfacesbare terrainwatermoss and lichen

← August Grande Prairie year-round climate October →Best places to visit in September

September weather nearby: Fort St. John 176 km · Jasper 259 km · Prince George 290 km · Stony Plain 360 km · Spruce Grove 365 km · St. Albert 375 km · Wîhkwêntôwin 387 km · Edmonton 389 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 Grande Prairie (55.1667°, -118.8027°, elevation 653 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	18	7
2	18	7
3	18	7
4	18	7
5	18	7
6	18	7
7	17	6
8	17	6
9	17	6
10	17	6
11	17	6
12	17	6
13	16	5
14	16	5
15	16	5
16	16	5
17	16	5
18	16	5
19	16	5
20	15	4
21	15	4
22	15	4
23	15	4
24	15	4
25	15	4
26	14	3
27	14	3
28	14	3
29	14	3
30	13	3

	Clearer (%)	Cloudier (%)
1	47	53
2	45	55
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	43	57
9	44	56
10	44	56
11	44	56
12	43	57
13	45	55
14	45	55
15	46	54
16	46	54
17	46	54
18	46	54
19	46	54
20	46	54
21	47	53
22	48	52
23	47	53
24	48	52
25	48	52
26	48	52
27	48	52
28	47	53
29	47	53
30	47	53

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	100	0
10	100	0
11	100	0
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	18	7
2	18	7
3	18	7
4	18	7
5	18	7
6	18	7
7	17	6
8	17	6
9	17	6
10	17	6
11	17	6
12	17	6
13	16	5
14	16	5
15	16	5
16	16	5
17	16	5
18	16	5
19	16	5
20	15	4
21	15	4
22	15	4
23	15	4
24	15	4
25	15	4
26	14	3
27	14	3
28	14	3
29	14	3
30	13	3

	Clearer (%)	Cloudier (%)
1	47	53
2	45	55
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	43	57
9	44	56
10	44	56
11	44	56
12	43	57
13	45	55
14	45	55
15	46	54
16	46	54
17	46	54
18	46	54
19	46	54
20	46	54
21	47	53
22	48	52
23	47	53
24	48	52
25	48	52
26	48	52
27	48	52
28	47	53
29	47	53
30	47	53

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	100	0
10	100	0
11	100	0
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	18	7
2	18	7
3	18	7
4	18	7
5	18	7
6	18	7
7	17	6
8	17	6
9	17	6
10	17	6
11	17	6
12	17	6
13	16	5
14	16	5
15	16	5
16	16	5
17	16	5
18	16	5
19	16	5
20	15	4
21	15	4
22	15	4
23	15	4
24	15	4
25	15	4
26	14	3
27	14	3
28	14	3
29	14	3
30	13	3

	Clearer (%)	Cloudier (%)
1	47	53
2	45	55
3	45	55
4	45	55
5	44	56
6	43	57
7	43	57
8	43	57
9	44	56
10	44	56
11	44	56
12	43	57
13	45	55
14	45	55
15	46	54
16	46	54
17	46	54
18	46	54
19	46	54
20	46	54
21	47	53
22	48	52
23	47	53
24	48	52
25	48	52
26	48	52
27	48	52
28	47	53
29	47	53
30	47	53

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

	Dry (%)	Comfortable (%)
1	98	2
2	99	1
3	99	1
4	99	1
5	99	1
6	99	1
7	99	1
8	99	1
9	100	0
10	100	0
11	100	0
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