Glen Avon weather in May

In May, Glen Avon sees average daytime highs of 76°F and overnight lows near 55°F, with 0.6 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 75°F in the first days to 78°F by the end. The sky is clear or mostly clear about 64% 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 Glen Avon's 6th-clearest and 1st-windiest month. For the whole year in context, see Glen Avon's year-round climate.

Daytime high
76°
6th warmest
Overnight low
55°
7th coldest
Rainfall
0.6 in
2.6 wet days
Daylight
13 h 48 min
4:53 AM – 6:39 PM
Cloud cover
33%
6th clearest
Wind
4 mph
1st windiest
Solar energy
7.4 kWh/m²
Travel score
8.6
out of 10

Glen Avon is town in California, United States.

Density
959/km²
people per km²

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 75°F in the first days to 78°F by the end.

A typical May day in Glen Avon reaches about 76°F in the afternoon and slips back to 55°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 88°F. Set against its neighbours, May runs about 5°F warmer than April and about 7°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17553
27553
37553
47553
57554
67554
77654
87654
97654
107654
117654
127655
137655
147655
157655
167655
177655
187655
197655
207655
217755
227755
237756
247756
257756
267856
277856
287856
297856
307957
317957

How May really feels in Glen Avon

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
0
heat index over the day's high
Days feeling ≤ 32°F
0
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.

Glen Avon 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 daysDaylight (hours)Travel score
Jan63° / 42°3.86.6106.2
Feb64° / 44°4.47.410.76.2
Mar67° / 47°2.76.811.76.8
Apr71° / 50°1.24.612.87.8
May76° / 55°0.62.613.78.6
Jun83° / 60°0.10.514.27.8
Jul89° / 65°0.10.5145.5
Aug91° / 67°0.00.313.34.9
Sep88° / 63°0.21.212.26.1
Oct79° / 56°0.93.111.18.3
Nov70° / 48°1.23.510.27.9
Dec62° / 42°2.65.89.86.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% 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 25%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47030
57030
67030
77030
87030
97030
107030
117228
127228
137327
147327
157426
167426
177525
187624
197624
207723
217723
227822
237822
247822
258020
268020
278119
288119
298119
308317
318317

Chance of precipitation in May

Any precipitation

Glen Avon gets around 0.6 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 12% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
112
212
312
411
511
611
711
811
911
1011
1111
1210
1310
1410
1510
169
179
189
198
208
218
227
237
246
256
265
275
284
294
303
313

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19370
29370
39280
49280
59190
69190
790100
889110
989110
1088120
1187130
1286131
1385141
1484151
1583161
1682171
1782171
1881181
1981181
2080191
2180191
2279201
2378211
2478211
2577221
2676231
2775241
2874251
2973261
3071272
3171272

Wind in May

Winds average 4 mph in May, the windiest month of the year.

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 5:07 AM to 4:45 AM, and sunset from 6:27 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:076:27
213.45:066:28
313.45:056:29
413.45:046:30
513.55:036:31
613.55:026:31
713.55:016:32
813.55:006:33
913.64:596:34
1013.64:586:34
1113.64:576:35
1213.74:566:36
1313.74:566:37
1413.74:556:38
1513.74:546:38
1613.84:536:39
1713.84:536:40
1813.84:526:41
1913.84:516:41
2013.94:516:42
2113.94:506:43
2213.94:496:44
2313.94:496:44
2413.94:486:45
2514.04:486:46
2614.04:476:46
2714.04:476:47
2814.04:466:48
2914.04:466:48
3014.14:456:49
3114.14:456:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.4 kWh/m².

For context, solar energy here swings from a low near 2.98 kWh/m² to a high of 8.15 kWh/m² in June across the year — May's 7.4 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.2Intense
57.2Intense
67.2Intense
77.2Intense
87.2Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.3Intense
147.3Intense
157.4Intense
167.4Intense
177.4Intense
187.4Intense
197.4Intense
207.5Intense
217.5Intense
227.5Intense
237.5Intense
247.6Intense
257.6Intense
267.6Intense
277.7Intense
287.7Intense
297.7Intense
307.8Intense
317.8Intense
Planning a trip in May

Is May a good time to visit Glen Avon?

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

8.6
Sightseeing
1st-best month of the year
7.6
Beach & pool
6th-best month of the year

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

What to pack for Glen Avon in May

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

In May, Glen Avon sees daytime highs around 76°F and nights near 55°F. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Glen Avon in May

The nearest coast averages about 63°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 mi away) is warmest in August at about 69°F and coldest in February near 59°F.

It's comfortable for a long swim from Jul 13 to Sep 28 — about 2.6 months when the water holds above 68°F.

60°65°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb59Cool
Mar59Cool
Apr60Cool
May63Cool
Jun65Cool
Jul68Refreshing
Aug69Refreshing
Sep69Refreshing
Oct67Cool
Nov64Cool
Dec60Cool

UV index in Glen Avon in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Glen Avon peaks around July 12 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 highHighModerateJul 12UV 11Dec 16UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Glen Avon 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 Glen Avon is worst in September — around 49 µg/m³ PM2.5 (poor), about 4.0× the cleanest month (May, 12 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateSep 1447 µg/m³May 1713 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar19Moderate
Apr17Moderate
May12Moderate
Jun17Moderate
Jul19Moderate
Aug32Moderate
Sep49Poor
Oct21Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Glen Avon?

Glen Avon sits at 34.0°N, 117.5°W, 755 ft above sea level, in United States. The nearest listed city is Jurupa Valley, 2.5 mi away.

Topography around Glen Avon

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

Within 2 miles, the terrain around Glen Avon has significant variations in elevation — a maximum elevation change of 1,053 ft around an average of 860 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,690 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 11,430 ft.

The land around Glen Avon is covered by artificial surfaces (53%) and grassland (22%) within 2 miles, artificial surfaces (65%) within 10 miles, and shrubs (26%) and artificial surfaces (23%) within 50 miles.

2 miles
1,053 ft
10 miles
1,690 ft
50 miles
11,430 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Jurupa Valley 2.5 mi · Rubidoux 5.0 mi · Eastvale 5.6 mi · Fontana 6.2 mi · Riverside 6.2 mi · Bloomington 6.2 mi · Norco 6.8 mi · Rancho Cucamonga 9.3 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 Glen Avon (34.0117°, -117.4848°, elevation 755 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).