Agua Caliente weather in May

In May, Agua Caliente sees average daytime highs of 71°F and overnight lows near 52°F, with 0.8 in of rain across 3.2 wet days and about 14 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 70°F in the first days to 73°F by the end. The sky is clear or mostly clear about 57% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 24 min by month's end. Set against the rest of the year, May is Agua Caliente's 6th-clearest and 1st-windiest month. For the whole year in context, see Agua Caliente's year-round climate.

Daytime high
71°
6th warmest
Overnight low
52°
8th coldest
Rainfall
0.8 in
3.2 wet days
Daylight
14 h 06 min
5:04 AM – 7:08 PM
Cloud cover
38%
6th clearest
Wind
6 mph
1st windiest
Solar energy
7.2 kWh/m²
Travel score
8.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 70°F in the first days to 73°F by the end.

A typical May day in Agua Caliente reaches about 71°F in the afternoon and slips back to 52°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 81°F. Set against its neighbours, May runs about 5°F warmer than April and about 6°F cooler than June.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17050
27050
37050
47050
57051
67051
77051
87051
97151
107151
117151
127151
137151
147151
157151
167151
177152
187152
197252
207252
217252
227252
237252
247253
257353
267353
277353
287353
297353
307453
317453

Agua Caliente 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
Jan57° / 42°4.99.79.64.1
Feb60° / 44°5.18.910.54.8
Mar63° / 46°3.78.511.75.8
Apr66° / 48°1.65.1137.0
May71° / 52°0.83.2148.1
Jun77° / 55°0.2114.69.0
Jul79° / 56°0.00.114.49.2
Aug79° / 56°0.00.213.59.1
Sep78° / 55°0.10.512.39.1
Oct73° / 52°1.12.9118.5
Nov63° / 46°2.569.96.2
Dec57° / 42°4.89.99.44.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66733
76733
86733
96733
106832
116832
126832
136931
147030
157129
167129
177228
187327
197327
207525
217525
227525
237723
247723
257723
267921
277921
287921
297822
307822
317822

Chance of precipitation in May

Any precipitation

Agua Caliente gets around 0.8 in of rain over 3.2 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 10% and peaks near 12% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
112
212
312
412
512
612
712
812
912
1012
1111
1211
1311
1411
1511
1611
1711
1811
1910
2010
2110
2210
239
249
258
268
277
287
297
306
316

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19730
29730
39730
49730
59730
69730
79730
89730
99730
109730
119640
129640
139640
149640
159550
169550
179451
189361
199361
209361
219271
229271
239181
249181
259091
269091
2789101
2889101
2988111
3088111
3187121

Wind in May

Winds average 6 mph in May, the windiest month of the year.

Across May, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 24 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 5:20 AM to 4:54 AM, and sunset from 6:54 PM to 7:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:206:54
213.65:196:55
313.65:186:56
413.75:166:57
513.75:156:58
613.85:146:59
713.85:137:00
813.85:127:01
913.95:117:02
1013.95:107:03
1113.95:097:04
1213.95:087:05
1314.05:077:06
1414.05:067:07
1514.05:057:07
1614.15:047:08
1714.15:037:09
1814.15:027:10
1914.25:027:11
2014.25:017:12
2114.25:007:13
2214.24:597:14
2314.34:597:14
2414.34:587:15
2514.34:577:16
2614.34:577:17
2714.44:567:18
2814.44:557:18
2914.44:557:19
3014.44:547:20
3114.44:547:21

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.2 kWh/m².

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 7.99 kWh/m² in June across the year — May's 7.2 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.9Intense
36.9Intense
46.9Intense
57.0Intense
67.0Intense
77.0Intense
87.0Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.2Intense
147.2Intense
157.2Intense
167.2Intense
177.2Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.3Intense
237.4Intense
247.4Intense
257.4Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.6Intense
317.6Intense
Planning a trip in May

Hazard calendar for Agua Caliente

In seasonPeak

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

Agua Caliente's rainy season runs November–March, 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 Agua Caliente?

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

8.1
Sightseeing
6th-best month of the year
5.6
Beach & pool
6th-best month of the year

May is one of the better times to visit Agua Caliente for general sightseeing.

What to pack for Agua Caliente in May

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

In May, Agua Caliente sees daytime highs around 71°F and nights near 52°F. Pack sun protection. About 3 days see rain.

sun protection

Sea temperature near Agua Caliente in May

The nearest coast averages about 53°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 32 mi away) is warmest in September at about 58°F and coldest in April near 53°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan53Bracing
Feb53Bracing
Mar54Bracing
Apr53Bracing
May53Bracing
Jun54Bracing
Jul56Bracing
Aug58Bracing
Sep58Bracing
Oct57Bracing
Nov55Bracing
Dec54Bracing

UV index in Agua Caliente in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Agua Caliente peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 10Dec 13UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Low

Air quality in Agua Caliente 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 Agua Caliente is worst in September — around 29 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1829 µg/m³Jun 127 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul10Good
Aug25Moderate
Sep29Moderate
Oct27Moderate
Nov16Moderate
Dec12Good
Location & terrain

Where is Agua Caliente?

Agua Caliente sits at 38.3°N, 122.5°W, 154 ft above sea level, in United States. The nearest listed city is Petaluma, 11 mi away.

Topography around Agua Caliente

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

Within 2 miles, the terrain around Agua Caliente has significant variations in elevation — a maximum elevation change of 1,181 ft around an average of 381 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,730 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,895 ft.

The land around Agua Caliente is covered by trees (62%) and grassland (24%) within 2 miles, trees (43%) and grassland (40%) within 10 miles, and trees (32%), grassland (27%) and water (25%) within 50 miles.

2 miles
1,181 ft
10 miles
2,730 ft
50 miles
4,895 ft
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Petaluma 11 mi · Napa 11 mi · Rohnert Park 12 mi · Santa Rosa 15 mi · Novato 16 mi · American Canyon 16 mi · Vallejo 20 mi · Windsor 24 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 Agua Caliente (38.3241°, -122.488°, elevation 154 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).