Chilliwack weather in May

In May, Chilliwack sees average daytime highs of 15°C and overnight lows near 6°C, with 122 mm of precipitation across 14.8 wet days and about 15 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 16°C by the end. The sky is clear or mostly clear about 16% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of May to 15 h 42 min by month's end. Set against the rest of the year, May is Chilliwack's 6th-clearest and 8th-windiest month. For the whole year in context, see Chilliwack's year-round climate.

Daytime high: 15°; 5th warmest
Overnight low: 6°; 8th coldest
Precipitation: 122 mm; 14.8 wet days
Daylight: 15 h 06 min; 4:32 AM – 7:36 PM
Cloud cover: 71%; 6th clearest
Wind: 5 km/h; 8th windiest
Solar energy: 5.19 kWh/m²
Travel score: 3.9; out of 10

Chilliwack is city in British Columbia, Canada.

Air quality: Good; PM2.5 6 µg/m³ · 2019
Density: 388/km²; people per km²

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

← April Chilliwack 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 16°C by the end.

A typical May day in Chilliwack reaches about 15°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 22°C. Set against its neighbours, May runs about 5°C warmer than April and about 2°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	13	13	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	16	16	16	16
Avg low (°C)	4	4	4	4	4	4	4	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	7

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

How May really feels in Chilliwack

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

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Chilliwack weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	2° / -2°	342	19.7	15.8	8.5	0.0
Feb	4° / -2°	212	16.3	12.4	9.8	0.0
Mar	6° / -1°	263	20	14.5	11.6	0.5
Apr	10° / 2°	172	17.3	7.3	13.4	1.9
May	15° / 6°	122	14.8	2	15	3.9
Jun	17° / 8°	102	14.4	0.1	15.9	4.8
Jul	21° / 11°	61	8.8	0	15.6	6.7
Aug	21° / 11°	74	8.6	0	14.2	6.8
Sep	17° / 8°	124	11.1	0	12.4	5.5
Oct	11° / 5°	256	17.4	2.2	10.5	2.4
Nov	5° / 1°	372	20.5	12.1	8.9	0.2
Dec	2° / -2°	325	20	16.8	8.1	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 70%.

	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 (%)	30	31	31	31	32	33	33	33	33	33	33	33	32	32	31	31	31	29	29	29	29	28	28	28	28	27	27	28	28	28	29
Cloudier (%)	70	69	69	69	68	67	67	67	67	67	67	67	68	68	69	69	69	71	71	71	71	72	72	72	72	73	73	72	72	72	71

	Clearer (%)	Cloudier (%)
1	30	70
2	31	69
3	31	69
4	31	69
5	32	68
6	33	67
7	33	67
8	33	67
9	33	67
10	33	67
11	33	67
12	33	67
13	32	68
14	32	68
15	31	69
16	31	69
17	31	69
18	29	71
19	29	71
20	29	71
21	29	71
22	28	72
23	28	72
24	28	72
25	28	72
26	27	73
27	27	73
28	28	72
29	28	72
30	28	72
31	29	71

Chance of precipitation in May

Any precipitationSnow

Chilliwack gets around 122 mm of rain and snow over 14.8 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 48% and peaks near 52% on the wettest days, and about 2 days bring snow.

	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 (%)	52	52	51	50	49	49	48	48	47	47	47	47	47	47	47	47	48	48	48	48	49	49	49	49	49	48	48	48	48	48	48
Snow chance (%)	14	14	13	13	12	11	11	10	9	9	8	7	6	6	5	4	4	4	3	3	3	2	2	2	2	2	2	2	1	1	1

	Rain chance (%)	Snow chance (%)
1	52	14
2	52	14
3	51	13
4	50	13
5	49	12
6	49	11
7	48	11
8	48	10
9	47	9
10	47	9
11	47	8
12	47	7
13	47	6
14	47	6
15	47	5
16	47	4
17	48	4
18	48	4
19	48	3
20	48	3
21	49	3
22	49	2
23	49	2
24	49	2
25	49	2
26	48	2
27	48	2
28	48	2
29	48	1
30	48	1
31	48	1

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 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 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)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 18 min at the start of May to 15 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over May. Sunrise moves from 4:55 AM to 4:16 AM, and sunset from 7:15 PM to 7:55 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)	14.3	14.4	14.4	14.5	14.5	14.6	14.6	14.7	14.7	14.8	14.8	14.9	14.9	15.0	15.0	15.1	15.1	15.2	15.2	15.3	15.3	15.3	15.4	15.4	15.5	15.5	15.5	15.6	15.6	15.6	15.7
Sunrise (AM)	4:55	4:54	4:52	4:50	4:48	4:47	4:45	4:44	4:42	4:40	4:39	4:37	4:36	4:34	4:33	4:32	4:30	4:29	4:28	4:27	4:25	4:24	4:23	4:22	4:21	4:20	4:19	4:18	4:17	4:16	4:16
Sunset (PM)	7:15	7:16	7:18	7:19	7:21	7:22	7:24	7:25	7:27	7:28	7:29	7:31	7:32	7:34	7:35	7:36	7:38	7:39	7:40	7:42	7:43	7:44	7:46	7:47	7:48	7:49	7:50	7:52	7:53	7:54	7:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.3	4:55	7:15
2	14.4	4:54	7:16
3	14.4	4:52	7:18
4	14.5	4:50	7:19
5	14.5	4:48	7:21
6	14.6	4:47	7:22
7	14.6	4:45	7:24
8	14.7	4:44	7:25
9	14.7	4:42	7:27
10	14.8	4:40	7:28
11	14.8	4:39	7:29
12	14.9	4:37	7:31
13	14.9	4:36	7:32
14	15.0	4:34	7:34
15	15.0	4:33	7:35
16	15.1	4:32	7:36
17	15.1	4:30	7:38
18	15.2	4:29	7:39
19	15.2	4:28	7:40
20	15.3	4:27	7:42
21	15.3	4:25	7:43
22	15.3	4:24	7:44
23	15.4	4:23	7:46
24	15.4	4:22	7:47
25	15.5	4:21	7:48
26	15.5	4:20	7:49
27	15.5	4:19	7:50
28	15.6	4:18	7:52
29	15.6	4:17	7:53
30	15.6	4:16	7:54
31	15.7	4:16	7:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.19 kWh/m².

For context, solar energy here swings from a low near 0.77 kWh/m² to a high of 5.91 kWh/m² in July across the year — May's 5.19 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)	4.9	5.0	5.0	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.3	5.3	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.9	Bright
2	5.0	Bright
3	5.0	Bright
4	5.1	Bright
5	5.1	Bright
6	5.1	Bright
7	5.2	Bright
8	5.2	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.3	Bright
13	5.3	Bright
14	5.2	Bright
15	5.2	Bright
16	5.2	Bright
17	5.2	Bright
18	5.2	Bright
19	5.2	Bright
20	5.2	Bright
21	5.2	Bright
22	5.2	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright
31	5.2	Bright

Planning a trip in May

Hazard calendar for Chilliwack

In seasonPeak

None of Chilliwack's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Chilliwack's rainy season runs October–April, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Chilliwack?

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

3.9

Sightseeing

5th-best month of the year

0.2

Beach & pool

5th-best month of the year

May is a weaker month for outdoor sightseeing in Chilliwack.

What to pack for Chilliwack in May

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

In May, Chilliwack sees daytime highs around 15°C and nights near 6°C. Pack rain gear. Worth having: a warm layer and sun protection. About 15 days see rain.

rain geara warm layersun protection

UV index in Chilliwack in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chilliwack peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	4	4	7	6	8	6	4	3	1	1
Level	Low	Low	Moderate	Moderate	High	High	Very high	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	4	Moderate
Apr	4	Moderate
May	7	High
Jun	6	High
Jul	8	Very high
Aug	6	High
Sep	4	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Chilliwack?

Chilliwack sits at 49.2°N, 122.0°W, 11 m above sea level, in Canada. The nearest listed city is Chilliwack-Downtown, 1.0 km away.

Topography around Chilliwack

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

Within 3 km, the terrain around Chilliwack has only modest variations in elevation — a maximum elevation change of 131 m around an average of 12 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,683 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,275 m.

The land around Chilliwack is covered by grassland (29%), trees (26%) and artificial surfaces (26%) within 3 km, trees (62%) within 16 km, and trees (72%) within 80 km.

3 km

131 m

grassland 29%

16 km

1,683 m

trees 62%

80 km

3,275 m

trees 72%

treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater

← April Chilliwack year-round climate June →Best places to visit in May

May weather nearby: Chilliwack-Downtown 1.0 km · Vedder Crossing 7.0 km · Abbotsford 25 km · Mission 26 km · Townline 32 km · Haney 47 km · Maple Ridge 48 km · Walnut Grove 50 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 Chilliwack (49.1664°, -121.9526°, elevation 11 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	13	4
2	13	4
3	13	4
4	13	4
5	13	4
6	14	4
7	14	4
8	14	5
9	14	5
10	14	5
11	14	5
12	15	5
13	15	5
14	15	5
15	15	6
16	15	6
17	15	6
18	15	6
19	15	6
20	15	6
21	16	6
22	16	6
23	16	7
24	16	7
25	16	7
26	16	7
27	16	7
28	16	7
29	16	7
30	16	7
31	16	7

	Clearer (%)	Cloudier (%)
1	30	70
2	31	69
3	31	69
4	31	69
5	32	68
6	33	67
7	33	67
8	33	67
9	33	67
10	33	67
11	33	67
12	33	67
13	32	68
14	32	68
15	31	69
16	31	69
17	31	69
18	29	71
19	29	71
20	29	71
21	29	71
22	28	72
23	28	72
24	28	72
25	28	72
26	27	73
27	27	73
28	28	72
29	28	72
30	28	72
31	29	71

	Rain chance (%)	Snow chance (%)
1	52	14
2	52	14
3	51	13
4	50	13
5	49	12
6	49	11
7	48	11
8	48	10
9	47	9
10	47	9
11	47	8
12	47	7
13	47	6
14	47	6
15	47	5
16	47	4
17	48	4
18	48	4
19	48	3
20	48	3
21	49	3
22	49	2
23	49	2
24	49	2
25	49	2
26	48	2
27	48	2
28	48	2
29	48	1
30	48	1
31	48	1

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

	Clearer (%)	Cloudier (%)
1	30	70
2	31	69
3	31	69
4	31	69
5	32	68
6	33	67
7	33	67
8	33	67
9	33	67
10	33	67
11	33	67
12	33	67
13	32	68
14	32	68
15	31	69
16	31	69
17	31	69
18	29	71
19	29	71
20	29	71
21	29	71
22	28	72
23	28	72
24	28	72
25	28	72
26	27	73
27	27	73
28	28	72
29	28	72
30	28	72
31	29	71

	Rain chance (%)	Snow chance (%)
1	52	14
2	52	14
3	51	13
4	50	13
5	49	12
6	49	11
7	48	11
8	48	10
9	47	9
10	47	9
11	47	8
12	47	7
13	47	6
14	47	6
15	47	5
16	47	4
17	48	4
18	48	4
19	48	3
20	48	3
21	49	3
22	49	2
23	49	2
24	49	2
25	49	2
26	48	2
27	48	2
28	48	2
29	48	1
30	48	1
31	48	1

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

	Clearer (%)	Cloudier (%)
1	30	70
2	31	69
3	31	69
4	31	69
5	32	68
6	33	67
7	33	67
8	33	67
9	33	67
10	33	67
11	33	67
12	33	67
13	32	68
14	32	68
15	31	69
16	31	69
17	31	69
18	29	71
19	29	71
20	29	71
21	29	71
22	28	72
23	28	72
24	28	72
25	28	72
26	27	73
27	27	73
28	28	72
29	28	72
30	28	72
31	29	71

	Rain chance (%)	Snow chance (%)
1	52	14
2	52	14
3	51	13
4	50	13
5	49	12
6	49	11
7	48	11
8	48	10
9	47	9
10	47	9
11	47	8
12	47	7
13	47	6
14	47	6
15	47	5
16	47	4
17	48	4
18	48	4
19	48	3
20	48	3
21	49	3
22	49	2
23	49	2
24	49	2
25	49	2
26	48	2
27	48	2
28	48	2
29	48	1
30	48	1
31	48	1

	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