Fort St. John weather in May

In May, Fort St. John sees average daytime highs of 16°C and overnight lows near 4°C, with 40 mm of precipitation across 8.2 wet days and about 16 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 20% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 hours at the start of May to 16 h 54 min by month's end. Set against the rest of the year, May is Fort St. John's 8th-clearest and 4th-windiest month. For the whole year in context, see Fort St. John's year-round climate.

Daytime high: 16°; 4th warmest
Overnight low: 4°; 8th coldest
Precipitation: 40 mm; 8.2 wet days
Daylight: 16 h 06 min; 4:58 AM – 9:02 PM
Cloud cover: 67%; 8th clearest
Wind: 10 km/h; 4th windiest
Solar energy: 5.94 kWh/m²
Travel score: 5.1; out of 10

Fort St. John is city in British Columbia, Canada.

Air quality: Good; PM2.5 9 µg/m³ · 2018
Density: 946/km²; people per km²
Founded: 1975

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

← April Fort St. John year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 18°C by the end.

A typical May day in Fort St. John reaches about 16°C in the afternoon and slips back to 4°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 22°C. Set against its neighbours, May runs about 7°C warmer than April and about 4°C cooler than June.

	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	31
Avg high (°C)	13	13	13	14	14	14	14	14	15	15	15	15	15	16	16	16	16	16	17	17	17	17	17	18	18	18	18	18	18	19	19
Avg low (°C)	1	1	1	1	2	2	2	2	2	2	3	3	3	3	3	4	4	4	4	5	5	5	5	5	6	6	6	6	6	6	7

	Avg high (°C)	Avg low (°C)
1	13	1
2	13	1
3	13	1
4	14	1
5	14	2
6	14	2
7	14	2
8	14	2
9	15	2
10	15	2
11	15	3
12	15	3
13	15	3
14	16	3
15	16	3
16	16	4
17	16	4
18	16	4
19	17	4
20	17	5
21	17	5
22	17	5
23	17	5
24	18	5
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	19	6
31	19	7

How May really feels in Fort St. John

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 11 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 May is cold — wind chill drags the overnight "feels like" below the raw low.

Fort St. John weather by month

How May compares with the rest of the year at a glance. May 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	-9° / -17°	25	7.1	7.6	7.3	0.0
Feb	-6° / -14°	16	4.5	5.3	9.1	0.0
Mar	-0° / -10°	23	6.6	7.1	11.4	0.0
Apr	9° / -2°	25	5.7	3.4	13.8	1.8
May	16° / 4°	40	8.2	1.1	16	5.1
Jun	20° / 8°	75	10.9	0	17.3	6.0
Jul	22° / 10°	80	11.3	0	16.8	6.4
Aug	21° / 9°	47	8.6	0	14.9	6.6
Sep	15° / 5°	43	8.1	0.5	12.5	4.8
Oct	7° / -1°	33	7.3	3.7	10.1	1.2
Nov	-3° / -10°	31	7.4	7.3	7.9	0.0
Dec	-8° / -15°	23	5.6	6.4	6.7	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 62%.

	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	31
Clearer (%)	33	35	35	35	36	37	38	39	39	39	39	39	38	38	38	38	38	38	38	38	39	39	38	38	39	39	39	40	40	40	38
Cloudier (%)	67	65	65	65	64	63	62	61	61	61	61	61	62	62	62	62	62	62	62	62	61	61	62	62	61	61	61	60	60	60	62

	Clearer (%)	Cloudier (%)
1	33	67
2	35	65
3	35	65
4	35	65
5	36	64
6	37	63
7	38	62
8	39	61
9	39	61
10	39	61
11	39	61
12	39	61
13	38	62
14	38	62
15	38	62
16	38	62
17	38	62
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	38	62
24	38	62
25	39	61
26	39	61
27	39	61
28	40	60
29	40	60
30	40	60
31	38	62

Chance of precipitation in May

Any precipitationSnow

Fort St. John gets around 40 mm of rain and snow over 8.2 wet days in May. 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 30% on the wettest days, and about 1 day brings snow. The odds climb 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	31
Rain chance (%)	22	22	22	22	22	23	23	24	24	25	25	26	26	26	27	27	28	28	28	28	29	29	29	29	29	29	28	29	29	29	30
Snow chance (%)	6	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	3	3	3	3	3	2	2	2	1	1	1	1	0	0

	Rain chance (%)	Snow chance (%)
1	22	6
2	22	5
3	22	5
4	22	5
5	22	5
6	23	5
7	23	5
8	24	4
9	24	4
10	25	4
11	25	4
12	26	4
13	26	4
14	26	4
15	27	4
16	27	4
17	28	4
18	28	3
19	28	3
20	28	3
21	29	3
22	29	3
23	29	2
24	29	2
25	29	2
26	29	1
27	28	1
28	29	1
29	29	1
30	29	0
31	30	0

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May 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	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 10 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	31
Wind speed (km/h)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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	calm

	Wind speed (km/h)	Feels
1	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm
31	10	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 hours at the start of May to 16 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 114 minutes over May. Sunrise moves from 5:30 AM to 4:35 AM, and sunset from 8:32 PM to 9:27 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	31
Daylight (h)	15.0	15.1	15.2	15.3	15.3	15.4	15.5	15.5	15.6	15.7	15.7	15.8	15.9	15.9	16.0	16.1	16.1	16.2	16.2	16.3	16.4	16.4	16.5	16.5	16.6	16.6	16.7	16.7	16.8	16.8	16.9
Sunrise (AM)	5:30	5:27	5:25	5:23	5:20	5:18	5:16	5:14	5:12	5:10	5:08	5:06	5:04	5:02	5:00	4:58	4:56	4:54	4:52	4:51	4:49	4:47	4:46	4:44	4:43	4:41	4:40	4:38	4:37	4:36	4:35
Sunset (PM)	8:32	8:34	8:36	8:38	8:40	8:42	8:44	8:46	8:48	8:50	8:52	8:54	8:56	8:58	9:00	9:02	9:03	9:05	9:07	9:09	9:11	9:13	9:14	9:16	9:18	9:19	9:21	9:23	9:24	9:26	9:27

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.0	5:30	8:32
2	15.1	5:27	8:34
3	15.2	5:25	8:36
4	15.3	5:23	8:38
5	15.3	5:20	8:40
6	15.4	5:18	8:42
7	15.5	5:16	8:44
8	15.5	5:14	8:46
9	15.6	5:12	8:48
10	15.7	5:10	8:50
11	15.7	5:08	8:52
12	15.8	5:06	8:54
13	15.9	5:04	8:56
14	15.9	5:02	8:58
15	16.0	5:00	9:00
16	16.1	4:58	9:02
17	16.1	4:56	9:03
18	16.2	4:54	9:05
19	16.2	4:52	9:07
20	16.3	4:51	9:09
21	16.4	4:49	9:11
22	16.4	4:47	9:13
23	16.5	4:46	9:14
24	16.5	4:44	9:16
25	16.6	4:43	9:18
26	16.6	4:41	9:19
27	16.7	4:40	9:21
28	16.7	4:38	9:23
29	16.8	4:37	9:24
30	16.8	4:36	9:26
31	16.9	4:35	9:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.94 kWh/m².

For context, solar energy here swings from a low near 0.54 kWh/m² to a high of 6.23 kWh/m² in June across the year — May's 5.94 kWh/m² sits near the top of that range.

	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	31
Solar energy (kWh/m²)	5.5	5.5	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1	6.2	6.2	6.2	6.2	6.2
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.5	Bright
3	5.6	Bright
4	5.6	Bright
5	5.7	Bright
6	5.7	Bright
7	5.7	Bright
8	5.8	Bright
9	5.8	Bright
10	5.8	Bright
11	5.8	Bright
12	5.9	Bright
13	5.9	Bright
14	5.9	Bright
15	5.9	Bright
16	5.9	Bright
17	6.0	Bright
18	6.0	Bright
19	6.0	Bright
20	6.0	Intense
21	6.0	Intense
22	6.0	Intense
23	6.1	Intense
24	6.1	Intense
25	6.1	Intense
26	6.1	Intense
27	6.2	Intense
28	6.2	Intense
29	6.2	Intense
30	6.2	Intense
31	6.2	Intense

Planning a trip in May

Is May a good time to visit Fort St. John?

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

5.1

Sightseeing

4th-best month of the year

0.9

Beach & pool

4th-best month of the year

May is a reasonable time to visit Fort St. John for sightseeing.

What to pack for Fort St. John in May

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

In May, Fort St. John sees daytime highs around 16°C and nights near 4°C. Worth packing: a warm layer, rain gear and sun protection. About 8 days see rain.

a warm layerrain gearsun protection

UV index in Fort St. John in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fort St. John peaks around July 13 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	4	6	7	4	3	1	1	0
Level	Low	Low	Moderate	Moderate	Moderate	High	High	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Moderate
Apr	3	Moderate
May	4	Moderate
Jun	6	High
Jul	7	High
Aug	4	Moderate
Sep	3	Moderate
Oct	1	Low
Nov	1	Low
Dec	0	Low

Air quality in Fort St. John in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Fort St. John is worst in May — around 22 µg/m³ PM2.5 (moderate), about 5.3× the cleanest month (March, 4 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Fort St. John's WHO annual average of 9 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	7	5	4	6	22	8	12	9	6	7	12	11
Level	Good	Good	Good	Good	Moderate	Good	Good	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	7	Good
Feb	5	Good
Mar	4	Good
Apr	6	Good
May	22	Moderate
Jun	8	Good
Jul	12	Good
Aug	9	Good
Sep	6	Good
Oct	7	Good
Nov	12	Good
Dec	11	Good

Location & terrain

Where is Fort St. John?

Fort St. John sits at 56.2°N, 120.9°W, 696 m above sea level, in Canada. The nearest listed city is Grande Prairie, 176 km away.

Topography around Fort St. John

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Fort St. John.

Within 3 km, the terrain around Fort St. John has only modest variations in elevation — a maximum elevation change of 126 m around an average of 685 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 466 m; within 80 km, large variations in elevation — a maximum elevation change of 963 m.

The land around Fort St. John is covered by artificial surfaces (32%), trees (26%) and grassland (25%) within 3 km, trees (50%) and grassland (24%) within 16 km, and trees (67%) and grassland (20%) within 80 km.

3 km

126 m

artificial surfaces 32%

16 km

466 m

trees 50%

80 km

963 m

trees 67%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← April Fort St. John year-round climate June →Best places to visit in May

May weather nearby: Grande Prairie 176 km · Prince George 286 km · Jasper 415 km · Terrace 526 km · Stony Plain 532 km · Spruce Grove 536 km · St. Albert 545 km · Wîhkwêntôwin 557 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 Fort St. John (56.2499°, -120.8529°, elevation 696 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. 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	13	1
2	13	1
3	13	1
4	14	1
5	14	2
6	14	2
7	14	2
8	14	2
9	15	2
10	15	2
11	15	3
12	15	3
13	15	3
14	16	3
15	16	3
16	16	4
17	16	4
18	16	4
19	17	4
20	17	5
21	17	5
22	17	5
23	17	5
24	18	5
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	19	6
31	19	7

	Clearer (%)	Cloudier (%)
1	33	67
2	35	65
3	35	65
4	35	65
5	36	64
6	37	63
7	38	62
8	39	61
9	39	61
10	39	61
11	39	61
12	39	61
13	38	62
14	38	62
15	38	62
16	38	62
17	38	62
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	38	62
24	38	62
25	39	61
26	39	61
27	39	61
28	40	60
29	40	60
30	40	60
31	38	62

	Rain chance (%)	Snow chance (%)
1	22	6
2	22	5
3	22	5
4	22	5
5	22	5
6	23	5
7	23	5
8	24	4
9	24	4
10	25	4
11	25	4
12	26	4
13	26	4
14	26	4
15	27	4
16	27	4
17	28	4
18	28	3
19	28	3
20	28	3
21	29	3
22	29	3
23	29	2
24	29	2
25	29	2
26	29	1
27	28	1
28	29	1
29	29	1
30	29	0
31	30	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	13	1
2	13	1
3	13	1
4	14	1
5	14	2
6	14	2
7	14	2
8	14	2
9	15	2
10	15	2
11	15	3
12	15	3
13	15	3
14	16	3
15	16	3
16	16	4
17	16	4
18	16	4
19	17	4
20	17	5
21	17	5
22	17	5
23	17	5
24	18	5
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	19	6
31	19	7

	Clearer (%)	Cloudier (%)
1	33	67
2	35	65
3	35	65
4	35	65
5	36	64
6	37	63
7	38	62
8	39	61
9	39	61
10	39	61
11	39	61
12	39	61
13	38	62
14	38	62
15	38	62
16	38	62
17	38	62
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	38	62
24	38	62
25	39	61
26	39	61
27	39	61
28	40	60
29	40	60
30	40	60
31	38	62

	Rain chance (%)	Snow chance (%)
1	22	6
2	22	5
3	22	5
4	22	5
5	22	5
6	23	5
7	23	5
8	24	4
9	24	4
10	25	4
11	25	4
12	26	4
13	26	4
14	26	4
15	27	4
16	27	4
17	28	4
18	28	3
19	28	3
20	28	3
21	29	3
22	29	3
23	29	2
24	29	2
25	29	2
26	29	1
27	28	1
28	29	1
29	29	1
30	29	0
31	30	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	13	1
2	13	1
3	13	1
4	14	1
5	14	2
6	14	2
7	14	2
8	14	2
9	15	2
10	15	2
11	15	3
12	15	3
13	15	3
14	16	3
15	16	3
16	16	4
17	16	4
18	16	4
19	17	4
20	17	5
21	17	5
22	17	5
23	17	5
24	18	5
25	18	6
26	18	6
27	18	6
28	18	6
29	18	6
30	19	6
31	19	7

	Clearer (%)	Cloudier (%)
1	33	67
2	35	65
3	35	65
4	35	65
5	36	64
6	37	63
7	38	62
8	39	61
9	39	61
10	39	61
11	39	61
12	39	61
13	38	62
14	38	62
15	38	62
16	38	62
17	38	62
18	38	62
19	38	62
20	38	62
21	39	61
22	39	61
23	38	62
24	38	62
25	39	61
26	39	61
27	39	61
28	40	60
29	40	60
30	40	60
31	38	62

	Rain chance (%)	Snow chance (%)
1	22	6
2	22	5
3	22	5
4	22	5
5	22	5
6	23	5
7	23	5
8	24	4
9	24	4
10	25	4
11	25	4
12	26	4
13	26	4
14	26	4
15	27	4
16	27	4
17	28	4
18	28	3
19	28	3
20	28	3
21	29	3
22	29	3
23	29	2
24	29	2
25	29	2
26	29	1
27	28	1
28	29	1
29	29	1
30	29	0
31	30	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100