Redlands weather in May

In May, Redlands sees average daytime highs of 74°F and overnight lows near 53°F, with 0.5 in of rain across 2.6 wet days and about 13.7 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 73°F in the first days to 77°F by the end. The sky is clear or mostly clear about 67% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Redlands's 6th-clearest and 6th-windiest month. For the whole year in context, see Redlands's year-round climate.

Daytime high
74°
6th warmest
Overnight low
53°
7th coldest
Rainfall
0.5 in
2.6 wet days
Daylight
13 h 48 min
4:52 AM – 6:38 PM
Cloud cover
30%
6th clearest
Wind
4 mph
6th windiest
Solar energy
7.53 kWh/m²
Travel score
8.6
out of 10

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

Density
755/km²
people per km²
Founded
1888

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 73°F in the first days to 77°F by the end.

A typical May day in Redlands reaches about 74°F in the afternoon and slips back to 53°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 86°F. Set against its neighbours, May runs about 6°F warmer than April and about 7°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17251
27351
37351
47351
57352
67352
77352
87352
97352
107352
117453
127453
137453
147453
157453
167453
177453
187453
197453
207454
217454
227554
237554
247554
257554
267655
277655
287655
297655
307755
317756

Redlands weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan60° / 41°2.96.10.6105.5
Feb61° / 42°3.66.81.110.75.5
Mar64° / 45°2.26.20.811.76.6
Apr69° / 48°1.13.90.312.87.7
May74° / 53°0.52.6013.78.6
Jun82° / 59°0.10.7014.28.2
Jul87° / 65°0.52.60146.0
Aug89° / 66°0.42.8013.35.5
Sep85° / 62°0.31.8012.27.0
Oct77° / 54°0.72.4011.18.7
Nov67° / 46°1.03.10.210.27.7
Dec60° / 41°2.250.49.85.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27624
37624
47624
57624
67624
77624
87624
97624
107624
117624
127723
137822
147822
157921
167921
178020
188020
198020
208119
218218
228218
238317
248317
258317
268317
278515
288515
298515
308614
318614

Chance of precipitation in May

Any precipitation

Redlands gets around 0.5 in of rain over 2.6 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 9% and peaks near 11% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
111
211
311
410
510
610
710
810
910
1010
1110
1210
1310
1410
1510
169
179
189
199
209
218
228
238
247
257
266
276
285
295
304
314

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1991
2991
3991
4991
5982
6982
7982
8982
9982
10982
11982
12982
13982
14982
15982
16982
17982
18982
19982
20982
21973
22973
23973
24973
25964
26964
27955
28955
29955
30946
31946

Wind in May

Winds average 4 mph in May.

Across May, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 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 48 minutes over May. Sunrise moves from 5:06 AM to 4:44 AM, and sunset from 6:26 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:066:26
213.45:056:27
313.45:046:28
413.45:036:29
513.55:026:29
613.55:016:30
713.55:006:31
813.64:596:32
913.64:586:33
1013.64:576:33
1113.64:566:34
1213.74:556:35
1313.74:546:36
1413.74:546:36
1513.74:536:37
1613.84:526:38
1713.84:516:39
1813.84:516:39
1913.84:506:40
2013.94:496:41
2113.94:496:42
2213.94:486:42
2313.94:476:43
2413.94:476:44
2514.04:466:45
2614.04:466:45
2714.04:456:46
2814.04:456:47
2914.04:446:47
3014.14:446:48
3114.14:446:49

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.53 kWh/m².

For context, solar energy here swings from a low near 3.02 kWh/m² to a high of 8.25 kWh/m² in June across the year — May's 7.53 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.4Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.5Intense
197.6Intense
207.6Intense
217.6Intense
227.6Intense
237.7Intense
247.7Intense
257.7Intense
267.8Intense
277.8Intense
287.8Intense
297.8Intense
307.9Intense
317.9Intense
Planning a trip in May

Is May a good time to visit Redlands?

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

8.6
Sightseeing
2nd-best month of the year
6.9
Beach & pool
6th-best month of the year

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

What to pack for Redlands in May

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

In May, Redlands sees daytime highs around 74°F and nights near 53°F. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

UV index in Redlands 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 Redlands peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Redlands 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 Redlands is worst in September — around 40 µg/m³ PM2.5 (poor), about 5.4× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1437 µg/m³Dec 207 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar11Good
Apr10Good
May8Good
Jun19Moderate
Jul12Moderate
Aug20Moderate
Sep40Poor
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Redlands?

Redlands sits at 34.1°N, 117.2°W, 1,358 ft above sea level, in United States. The nearest listed city is Loma Linda, 4.3 mi away.

Topography around Redlands

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

Within 2 miles, the terrain around Redlands has only modest variations in elevation — a maximum elevation change of 561 ft around an average of 1,427 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,902 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,417 ft.

The land around Redlands is covered by artificial surfaces (69%) and trees (21%) within 2 miles, artificial surfaces (32%), grassland (25%) and shrubs (23%) within 10 miles, and shrubs (30%) within 50 miles.

2 miles
561 ft
10 miles
4,902 ft
50 miles
11,417 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Loma Linda 4.3 mi · Highland 5.0 mi · San Bernardino 6.8 mi · Colton 7.5 mi · Yucaipa 8.1 mi · Moreno Valley 8.7 mi · Rialto 11 mi · Bloomington 12 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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Redlands (34.0556°, -117.1825°, elevation 1,358 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. 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).