Patterson weather in May

In May, Patterson sees average daytime highs of 79°F and overnight lows near 55°F, with 0.7 in of rain across 3.1 wet days and about 14 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 77°F in the first days to 83°F by the end. The sky is clear or mostly clear about 60% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 24 min by month's end. Set against the rest of the year, May is Patterson's 6th-clearest and 1st-windiest month. For the whole year in context, see Patterson's year-round climate.

Daytime high
79°
5th warmest
Overnight low
55°
8th coldest
Rainfall
0.7 in
3.1 wet days
Daylight
14 hours
5:01 AM – 7:01 PM
Cloud cover
35%
6th clearest
Wind
6 mph
1st windiest
Solar energy
7.46 kWh/m²
Travel score
8.1
out of 10

Patterson is city in Stanislaus County, California, United States.

Density
1,390/km²
people per km²
Founded
1909

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 77°F in the first days to 83°F by the end.

A typical May day in Patterson reaches about 79°F in the afternoon and slips back to 55°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 92°F. Set against its neighbours, May runs about 8°F warmer than April and about 8°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17653
27653
37753
47753
57753
67753
77853
87854
97854
107854
117854
127854
137954
147954
157955
167955
177955
188055
198055
208055
218055
228056
238156
248156
258156
268256
278256
288257
298357
308357
318357

How May really feels in Patterson

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.

Patterson weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan57° / 42°3.38.89.74.2
Feb60° / 44°3.28.910.65.0
Mar65° / 46°2.68.911.76.2
Apr71° / 49°1.35.112.97.6
May79° / 55°0.73.1148.1
Jun87° / 60°0.2114.56.2
Jul92° / 64°0.00.214.34.4
Aug91° / 63°0.10.213.44.9
Sep86° / 60°0.10.812.36.7
Oct77° / 54°0.82.4118.6
Nov65° / 46°1.55.5106.6
Dec57° / 41°2.88.29.54.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% 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 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47129
57129
67129
77129
87129
97030
107030
117030
127030
137129
147129
157228
167228
177228
187228
197327
207426
217426
227426
237624
247624
257723
267723
277723
287822
297822
308020
318020

Chance of precipitation in May

Any precipitation

Patterson gets around 0.7 in of rain over 3.1 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
211
311
411
511
611
711
811
911
1011
1111
1211
1311
1411
1511
1611
1710
1810
1910
2010
2110
2210
239
249
258
268
278
287
297
307
317

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 99% 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
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27982
28982
29982
30982
31982

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 30 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 54 minutes over May. Sunrise moves from 5:16 AM to 4:51 AM, and sunset from 6:47 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:166:47
213.65:156:48
313.65:146:49
413.65:126:50
513.75:116:51
613.75:106:52
713.75:096:53
813.85:086:54
913.85:076:55
1013.85:066:56
1113.95:056:57
1213.95:046:57
1313.95:036:58
1413.95:026:59
1514.05:017:00
1614.05:017:01
1714.05:007:02
1814.14:597:03
1914.14:587:04
2014.14:577:04
2114.14:577:05
2214.24:567:06
2314.24:557:07
2414.24:557:08
2514.24:547:08
2614.34:537:09
2714.34:537:10
2814.34:527:11
2914.34:527:12
3014.34:517:12
3114.44:517:13

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.46 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 8.26 kWh/m² in June across the year — May's 7.46 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.1Intense
37.1Intense
47.1Intense
57.2Intense
67.2Intense
77.2Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.4Intense
147.4Intense
157.4Intense
167.5Intense
177.5Intense
187.5Intense
197.5Intense
207.5Intense
217.6Intense
227.6Intense
237.6Intense
247.7Intense
257.7Intense
267.7Intense
277.8Intense
287.8Intense
297.8Intense
307.9Intense
317.9Intense
Planning a trip in May

Is May a good time to visit Patterson?

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

8.1
Sightseeing
2nd-best month of the year
7.9
Beach & pool
5th-best month of the year

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

What to pack for Patterson in May

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

In May, Patterson sees daytime highs around 79°F and nights near 55°F. Pack sun protection. Worth having: light clothes. About 3 days see rain.

sun protectionlight clothes

UV index in Patterson 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 Patterson peaks around June 21 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highVery highHighModerateJun 21UV 10Dec 17UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Patterson 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 Patterson is worst in August — around 34 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1832 µg/m³Jun 157 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul9Good
Aug34Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec12Good
Location & terrain

Where is Patterson?

Patterson sits at 37.5°N, 121.1°W, 102 ft above sea level, in United States. The nearest listed city is Ceres, 12 mi away.

Topography around Patterson

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

Within 2 miles, the terrain around Patterson has only modest variations in elevation — a maximum elevation change of 108 ft around an average of 105 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,142 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,298 ft.

The land around Patterson is covered by cropland (32%), artificial surfaces (25%) and trees (23%) within 2 miles, grassland (41%), cropland (32%) and trees (21%) within 10 miles, and grassland (46%) and trees (24%) within 50 miles.

2 miles
108 ft
10 miles
2,142 ft
50 miles
4,298 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Ceres 12 mi · Modesto 14 mi · Turlock 16 mi · Ripon 19 mi · Riverbank 21 mi · Manteca 23 mi · Tracy 25 mi · Lathrop 25 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 Patterson (37.4716°, -121.1297°, elevation 102 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).