Barstow weather in May

In May, Barstow sees average daytime highs of 83°F and overnight lows near 57°F, with 0.1 in of rain across 0.3 wet days and about 13.8 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 80°F in the first days to 87°F by the end. The sky is clear or mostly clear about 75% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Barstow's 6th-clearest and 1st-windiest month. For the whole year in context, see Barstow's year-round climate.

Daytime high: 83°; 5th warmest
Overnight low: 57°; 8th coldest
Rainfall: 0.1 in; 0.3 wet days
Daylight: 13 h 48 min; 4:50 AM – 6:39 PM
Cloud cover: 24%; 6th clearest
Wind: 10 mph; 1st windiest
Solar energy: 8.24 kWh/m²
Travel score: 7.8; out of 10

Barstow is city in San Bernardino County, California, United States.

Density: 221/km²; people per km²
Founded: 1947

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

← April Barstow 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 80°F in the first days to 87°F by the end.

A typical May day in Barstow reaches about 83°F in the afternoon and slips back to 57°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 94°F. Set against its neighbours, May runs about 9°F warmer than April and about 10°F 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 (°F)	79	80	80	80	80	81	81	81	81	82	82	82	82	82	82	83	83	83	83	84	84	84	84	85	85	85	86	86	87	87	87
Avg low (°F)	54	54	55	55	55	55	55	56	56	56	56	56	57	57	57	57	58	58	58	58	58	58	59	59	59	60	60	60	60	61	61

	Avg high (°F)	Avg low (°F)
1	79	54
2	80	54
3	80	55
4	80	55
5	80	55
6	81	55
7	81	55
8	81	56
9	81	56
10	82	56
11	82	56
12	82	56
13	82	57
14	82	57
15	82	57
16	83	57
17	83	58
18	83	58
19	83	58
20	84	58
21	84	58
22	84	58
23	84	59
24	85	59
25	85	59
26	85	60
27	86	60
28	86	60
29	87	60
30	87	61
31	87	61

How May really feels in Barstow

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

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.

Barstow weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	58° / 38°	0.7	3.3	9.9	5.2
Feb	62° / 41°	0.9	3.7	10.7	6.3
Mar	68° / 46°	0.5	2.5	11.7	7.8
Apr	74° / 50°	0.3	1.5	12.9	8.7
May	83° / 57°	0.1	0.3	13.8	7.8
Jun	92° / 65°	0.0	0.2	14.3	4.4
Jul	98° / 72°	0.2	1.1	14.1	2.2
Aug	97° / 71°	0.1	0.6	13.3	2.5
Sep	90° / 64°	0.1	0.6	12.2	5.2
Oct	78° / 54°	0.2	1.1	11.1	8.7
Nov	65° / 43°	0.3	1.4	10.2	7.6
Dec	57° / 37°	0.6	2.5	9.7	4.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 14%.

	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 (%)	84	84	84	84	83	83	83	84	84	84	84	84	85	85	86	86	86	86	87	87	88	88	88	89	89	89	89	89	89	89	90
Cloudier (%)	16	16	16	16	17	17	17	16	16	16	16	16	15	15	14	14	14	14	13	13	12	12	12	11	11	11	11	11	11	11	10

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	83	17
6	83	17
7	83	17
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	85	15
14	85	15
15	86	14
16	86	14
17	86	14
18	86	14
19	87	13
20	87	13
21	88	12
22	88	12
23	88	12
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11
31	90	10

Chance of precipitation in May

Any precipitation

Barstow gets around 0.1 in of rain over 0.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 3% on the wettest days.

	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 (%)	3	3	3	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1

	Rain chance (%)
1	3
2	3
3	3
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	2
14	2
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1
31	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 10 mph in May, the windiest month of the year.

Across May, daily wind ranges from about 10 mph on the calmest days to 10 mph 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 (mph)	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	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:04 AM to 4:41 AM, and sunset from 6:27 PM to 6:50 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)	13.4	13.4	13.4	13.5	13.5	13.5	13.6	13.6	13.6	13.7	13.7	13.7	13.7	13.8	13.8	13.8	13.8	13.9	13.9	13.9	13.9	14.0	14.0	14.0	14.0	14.1	14.1	14.1	14.1	14.1	14.1
Sunrise (AM)	5:04	5:03	5:02	5:01	4:59	4:58	4:57	4:57	4:56	4:55	4:54	4:53	4:52	4:51	4:50	4:50	4:49	4:48	4:47	4:47	4:46	4:45	4:45	4:44	4:44	4:43	4:43	4:42	4:42	4:41	4:41
Sunset (PM)	6:27	6:28	6:29	6:29	6:30	6:31	6:32	6:33	6:33	6:34	6:35	6:36	6:37	6:37	6:38	6:39	6:40	6:41	6:41	6:42	6:43	6:44	6:44	6:45	6:46	6:47	6:47	6:48	6:49	6:49	6:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.4	5:04	6:27
2	13.4	5:03	6:28
3	13.4	5:02	6:29
4	13.5	5:01	6:29
5	13.5	4:59	6:30
6	13.5	4:58	6:31
7	13.6	4:57	6:32
8	13.6	4:57	6:33
9	13.6	4:56	6:33
10	13.7	4:55	6:34
11	13.7	4:54	6:35
12	13.7	4:53	6:36
13	13.7	4:52	6:37
14	13.8	4:51	6:37
15	13.8	4:50	6:38
16	13.8	4:50	6:39
17	13.8	4:49	6:40
18	13.9	4:48	6:41
19	13.9	4:47	6:41
20	13.9	4:47	6:42
21	13.9	4:46	6:43
22	14.0	4:45	6:44
23	14.0	4:45	6:44
24	14.0	4:44	6:45
25	14.0	4:44	6:46
26	14.1	4:43	6:47
27	14.1	4:43	6:47
28	14.1	4:42	6:48
29	14.1	4:42	6:49
30	14.1	4:41	6:49
31	14.1	4:41	6:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 8.24 kWh/m².

For context, solar energy here swings from a low near 3.12 kWh/m² to a high of 8.65 kWh/m² in June across the year — May's 8.24 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)	8.0	8.0	8.0	8.0	8.1	8.1	8.1	8.1	8.1	8.1	8.2	8.2	8.2	8.2	8.2	8.2	8.3	8.3	8.3	8.3	8.3	8.3	8.3	8.4	8.4	8.4	8.4	8.4	8.4	8.5	8.5
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	8.0	Intense
2	8.0	Intense
3	8.0	Intense
4	8.0	Intense
5	8.1	Intense
6	8.1	Intense
7	8.1	Intense
8	8.1	Intense
9	8.1	Intense
10	8.1	Intense
11	8.2	Intense
12	8.2	Intense
13	8.2	Intense
14	8.2	Intense
15	8.2	Intense
16	8.2	Intense
17	8.3	Intense
18	8.3	Intense
19	8.3	Intense
20	8.3	Intense
21	8.3	Intense
22	8.3	Intense
23	8.3	Intense
24	8.4	Intense
25	8.4	Intense
26	8.4	Intense
27	8.4	Intense
28	8.4	Intense
29	8.4	Intense
30	8.5	Intense
31	8.5	Intense

Planning a trip in May

Is May a good time to visit Barstow?

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

7.8

Sightseeing

3rd-best month of the year

8.8

Beach & pool

1st-best month of the year

May is one of the better times to visit Barstow for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Barstow in May

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

In May, Barstow sees daytime highs around 83°F and nights near 57°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Barstow in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Barstow peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	5	5	8	8	11	11	11	8	6	3	3
Level	Moderate	Moderate	High	Very high	Very high	Extreme	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	5	High
Apr	8	Very high
May	8	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	8	Very high
Oct	6	High
Nov	3	Moderate
Dec	3	Moderate

Location & terrain

Where is Barstow?

Barstow sits at 34.9°N, 117.0°W, 2,175 ft above sea level, in United States. The nearest listed city is Barstow Heights, 2.5 mi away.

Topography around Barstow

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Barstow.

Within 2 miles, the terrain around Barstow has only modest variations in elevation — a maximum elevation change of 525 ft around an average of 2,211 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,096 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,891 ft.

The land around Barstow is covered by bare terrain (55%) and artificial surfaces (35%) within 2 miles, bare terrain (91%) within 10 miles, and bare terrain (69%) within 50 miles.

2 miles

525 ft

bare terrain 55%

10 miles

2,096 ft

bare terrain 91%

50 miles

8,891 ft

bare terrain 69%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

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

May weather nearby: Barstow Heights 2.5 mi · Apple Valley 29 mi · Victorville 29 mi · Adelanto 31 mi · Hesperia 36 mi · Highland 54 mi · San Bernardino 57 mi · Rialto 58 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; 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 Barstow (34.8986°, -117.0228°, elevation 2,175 ft), 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 (°F)	Avg low (°F)
1	79	54
2	80	54
3	80	55
4	80	55
5	80	55
6	81	55
7	81	55
8	81	56
9	81	56
10	82	56
11	82	56
12	82	56
13	82	57
14	82	57
15	82	57
16	83	57
17	83	58
18	83	58
19	83	58
20	84	58
21	84	58
22	84	58
23	84	59
24	85	59
25	85	59
26	85	60
27	86	60
28	86	60
29	87	60
30	87	61
31	87	61

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	83	17
6	83	17
7	83	17
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	85	15
14	85	15
15	86	14
16	86	14
17	86	14
18	86	14
19	87	13
20	87	13
21	88	12
22	88	12
23	88	12
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11
31	90	10

	Rain chance (%)
1	3
2	3
3	3
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	2
14	2
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1
31	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 (°F)	Avg low (°F)
1	79	54
2	80	54
3	80	55
4	80	55
5	80	55
6	81	55
7	81	55
8	81	56
9	81	56
10	82	56
11	82	56
12	82	56
13	82	57
14	82	57
15	82	57
16	83	57
17	83	58
18	83	58
19	83	58
20	84	58
21	84	58
22	84	58
23	84	59
24	85	59
25	85	59
26	85	60
27	86	60
28	86	60
29	87	60
30	87	61
31	87	61

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	83	17
6	83	17
7	83	17
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	85	15
14	85	15
15	86	14
16	86	14
17	86	14
18	86	14
19	87	13
20	87	13
21	88	12
22	88	12
23	88	12
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11
31	90	10

	Rain chance (%)
1	3
2	3
3	3
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	2
14	2
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1
31	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 (°F)	Avg low (°F)
1	79	54
2	80	54
3	80	55
4	80	55
5	80	55
6	81	55
7	81	55
8	81	56
9	81	56
10	82	56
11	82	56
12	82	56
13	82	57
14	82	57
15	82	57
16	83	57
17	83	58
18	83	58
19	83	58
20	84	58
21	84	58
22	84	58
23	84	59
24	85	59
25	85	59
26	85	60
27	86	60
28	86	60
29	87	60
30	87	61
31	87	61

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	83	17
6	83	17
7	83	17
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	85	15
14	85	15
15	86	14
16	86	14
17	86	14
18	86	14
19	87	13
20	87	13
21	88	12
22	88	12
23	88	12
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11
31	90	10

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