Manteca weather in May

In May, Manteca sees average daytime highs of 81°F and overnight lows near 55°F, with 0.7 in of rain across 3 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 79°F in the first days to 84°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 Manteca's 6th-clearest and 1st-windiest month. For the whole year in context, see Manteca's year-round climate.

Daytime high: 81°; 5th warmest
Overnight low: 55°; 8th coldest
Rainfall: 0.7 in; 3 wet days
Daylight: 14 hours; 5:00 AM – 7:02 PM
Cloud cover: 35%; 6th clearest
Wind: 6 mph; 1st windiest
Solar energy: 7.45 kWh/m²
Travel score: 7.8; out of 10

Manteca is city in San Joaquin County, California, United States.

Density: 1,640/km²; people per km²
Founded: 1861

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

← April Manteca 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 79°F in the first days to 84°F by the end.

A typical May day in Manteca reaches about 81°F in the afternoon and slips back to 55°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 92°F. Set against its neighbours, May runs about 8°F warmer than April and about 7°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)	78	78	79	79	79	79	79	80	80	80	80	80	80	81	81	81	81	81	82	82	82	82	82	83	83	83	83	84	84	84	85
Avg low (°F)	53	53	53	54	54	54	54	54	54	54	55	55	55	55	55	55	55	55	56	56	56	56	56	56	56	57	57	57	57	57	58

	Avg high (°F)	Avg low (°F)
1	78	53
2	78	53
3	79	53
4	79	54
5	79	54
6	79	54
7	79	54
8	80	54
9	80	54
10	80	54
11	80	55
12	80	55
13	80	55
14	81	55
15	81	55
16	81	55
17	81	55
18	81	55
19	82	56
20	82	56
21	82	56
22	82	56
23	82	56
24	83	56
25	83	56
26	83	57
27	83	57
28	84	57
29	84	57
30	84	57
31	85	58

How May really feels in Manteca

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.

Manteca 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.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	58° / 42°	3.3	8.6	9.7	4.5
Feb	62° / 44°	3.0	8.5	10.5	5.5
Mar	67° / 47°	2.6	8.2	11.7	6.6
Apr	73° / 50°	1.3	4.8	12.9	7.8
May	81° / 55°	0.7	3	14	7.8
Jun	88° / 60°	0.1	0.8	14.6	5.8
Jul	92° / 62°	0.0	0	14.3	4.8
Aug	90° / 61°	0.0	0.1	13.5	5.3
Sep	86° / 58°	0.1	0.6	12.3	6.7
Oct	78° / 53°	0.8	2.4	11	8.6
Nov	66° / 46°	1.6	5.2	10	6.8
Dec	58° / 41°	2.9	7.9	9.4	4.6

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.

	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 (%)	69	69	70	70	70	70	70	70	70	70	70	71	71	71	72	72	72	72	73	74	74	75	76	76	77	78	79	79	79	80	80
Cloudier (%)	31	31	30	30	30	30	30	30	30	30	30	29	29	29	28	28	28	28	27	26	26	25	24	24	23	22	21	21	21	20	20

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	72	28
18	72	28
19	73	27
20	74	26
21	74	26
22	75	25
23	76	24
24	76	24
25	77	23
26	78	22
27	79	21
28	79	21
29	79	21
30	80	20
31	80	20

Chance of precipitation in May

Any precipitation

Manteca gets around 0.7 in of rain over 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 9% and peaks near 11% 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 (%)	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	9	9	9	8	8	7	7	7	6	6	6	6

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

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 96% 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 (%)	96	96	96	96	96	96	96	96	96	97	97	97	97	97	97	97	97	97	97	97	97	96	96	96	95	95	94	94	93	93	92
Comfortable (%)	4	4	4	4	4	4	4	4	4	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	5	5	6	6	7	7	8

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	97	3
11	97	3
12	97	3
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	96	4
23	96	4
24	96	4
25	95	5
26	95	5
27	94	6
28	94	6
29	93	7
30	93	7
31	92	8

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.

	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)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

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 4:50 AM, and sunset from 6:48 PM to 7:14 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)	13.5	13.6	13.6	13.6	13.7	13.7	13.8	13.8	13.8	13.8	13.9	13.9	13.9	14.0	14.0	14.0	14.1	14.1	14.1	14.1	14.2	14.2	14.2	14.2	14.3	14.3	14.3	14.3	14.4	14.4	14.4
Sunrise (AM)	5:16	5:15	5:13	5:12	5:11	5:10	5:09	5:08	5:07	5:06	5:05	5:04	5:03	5:02	5:01	5:00	4:59	4:58	4:58	4:57	4:56	4:55	4:55	4:54	4:53	4:53	4:52	4:52	4:51	4:51	4:50
Sunset (PM)	6:48	6:49	6:50	6:51	6:52	6:53	6:54	6:55	6:56	6:57	6:58	6:59	6:59	7:00	7:01	7:02	7:03	7:04	7:05	7:06	7:06	7:07	7:08	7:09	7:10	7:10	7:11	7:12	7:13	7:13	7:14

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.5	5:16	6:48
2	13.6	5:15	6:49
3	13.6	5:13	6:50
4	13.6	5:12	6:51
5	13.7	5:11	6:52
6	13.7	5:10	6:53
7	13.8	5:09	6:54
8	13.8	5:08	6:55
9	13.8	5:07	6:56
10	13.8	5:06	6:57
11	13.9	5:05	6:58
12	13.9	5:04	6:59
13	13.9	5:03	6:59
14	14.0	5:02	7:00
15	14.0	5:01	7:01
16	14.0	5:00	7:02
17	14.1	4:59	7:03
18	14.1	4:58	7:04
19	14.1	4:58	7:05
20	14.1	4:57	7:06
21	14.2	4:56	7:06
22	14.2	4:55	7:07
23	14.2	4:55	7:08
24	14.2	4:54	7:09
25	14.3	4:53	7:10
26	14.3	4:53	7:10
27	14.3	4:52	7:11
28	14.3	4:52	7:12
29	14.4	4:51	7:13
30	14.4	4:51	7:13
31	14.4	4:50	7:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.45 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 8.27 kWh/m² in July across the year — May's 7.45 kWh/m² falls in the middle.

	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)	7.0	7.1	7.1	7.1	7.2	7.2	7.2	7.2	7.3	7.3	7.3	7.3	7.4	7.4	7.4	7.4	7.5	7.5	7.5	7.5	7.6	7.6	7.6	7.7	7.7	7.7	7.8	7.8	7.8	7.9	7.9
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	7.0	Intense
2	7.1	Intense
3	7.1	Intense
4	7.1	Intense
5	7.2	Intense
6	7.2	Intense
7	7.2	Intense
8	7.2	Intense
9	7.3	Intense
10	7.3	Intense
11	7.3	Intense
12	7.3	Intense
13	7.4	Intense
14	7.4	Intense
15	7.4	Intense
16	7.4	Intense
17	7.5	Intense
18	7.5	Intense
19	7.5	Intense
20	7.5	Intense
21	7.6	Intense
22	7.6	Intense
23	7.6	Intense
24	7.7	Intense
25	7.7	Intense
26	7.7	Intense
27	7.8	Intense
28	7.8	Intense
29	7.8	Intense
30	7.9	Intense
31	7.9	Intense

Planning a trip in May

Is May a good time to visit Manteca?

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

7.8

Sightseeing

2nd-best month of the year

8.2

Beach & pool

5th-best month of the year

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

What to pack for Manteca in May

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

In May, Manteca sees daytime highs around 81°F and nights near 55°F. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Manteca 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 Manteca 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	4	7	8	10	10	10	6	5	2	2
Level	Moderate	Moderate	Moderate	High	Very high	Extreme	Very high	Very high	High	High	Moderate	Moderate

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	4	Moderate
Apr	7	High
May	8	Very high
Jun	10	Extreme
Jul	10	Very high
Aug	10	Very high
Sep	6	High
Oct	5	High
Nov	2	Moderate
Dec	2	Moderate

Air quality in Manteca 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 Manteca 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	13	13	10	8	7	9	34	16	14	15	12
Level	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Good

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	13	Moderate
Mar	13	Moderate
Apr	10	Good
May	8	Good
Jun	7	Good
Jul	9	Good
Aug	34	Moderate
Sep	16	Moderate
Oct	14	Moderate
Nov	15	Moderate
Dec	12	Good

Location & terrain

Where is Manteca?

Manteca sits at 37.8°N, 121.2°W, 36 ft above sea level, in United States. The nearest listed city is Lathrop, 3.7 mi away.

Topography around Manteca

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

Within 2 miles, the terrain around Manteca has only modest variations in elevation — a maximum elevation change of 59 ft around an average of 36 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 197 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,259 ft.

The land around Manteca is covered by artificial surfaces (67%) within 2 miles, cropland (35%) and trees (29%) within 10 miles, and grassland (44%) and trees (25%) within 50 miles.

2 miles

59 ft

artificial surfaces 67%

10 miles

197 ft

cropland 35%

50 miles

4,259 ft

grassland 44%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

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

May weather nearby: Lathrop 3.7 mi · Ripon 6.2 mi · Stockton 12 mi · Tracy 12 mi · Riverbank 16 mi · Modesto 16 mi · Ceres 20 mi · Oakdale 21 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 Manteca (37.7974°, -121.216°, elevation 36 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).

	Avg high (°F)	Avg low (°F)
1	78	53
2	78	53
3	79	53
4	79	54
5	79	54
6	79	54
7	79	54
8	80	54
9	80	54
10	80	54
11	80	55
12	80	55
13	80	55
14	81	55
15	81	55
16	81	55
17	81	55
18	81	55
19	82	56
20	82	56
21	82	56
22	82	56
23	82	56
24	83	56
25	83	56
26	83	57
27	83	57
28	84	57
29	84	57
30	84	57
31	85	58

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	72	28
18	72	28
19	73	27
20	74	26
21	74	26
22	75	25
23	76	24
24	76	24
25	77	23
26	78	22
27	79	21
28	79	21
29	79	21
30	80	20
31	80	20

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

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	97	3
11	97	3
12	97	3
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	96	4
23	96	4
24	96	4
25	95	5
26	95	5
27	94	6
28	94	6
29	93	7
30	93	7
31	92	8

	Avg high (°F)	Avg low (°F)
1	78	53
2	78	53
3	79	53
4	79	54
5	79	54
6	79	54
7	79	54
8	80	54
9	80	54
10	80	54
11	80	55
12	80	55
13	80	55
14	81	55
15	81	55
16	81	55
17	81	55
18	81	55
19	82	56
20	82	56
21	82	56
22	82	56
23	82	56
24	83	56
25	83	56
26	83	57
27	83	57
28	84	57
29	84	57
30	84	57
31	85	58

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	72	28
18	72	28
19	73	27
20	74	26
21	74	26
22	75	25
23	76	24
24	76	24
25	77	23
26	78	22
27	79	21
28	79	21
29	79	21
30	80	20
31	80	20

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

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	97	3
11	97	3
12	97	3
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	96	4
23	96	4
24	96	4
25	95	5
26	95	5
27	94	6
28	94	6
29	93	7
30	93	7
31	92	8

	Avg high (°F)	Avg low (°F)
1	78	53
2	78	53
3	79	53
4	79	54
5	79	54
6	79	54
7	79	54
8	80	54
9	80	54
10	80	54
11	80	55
12	80	55
13	80	55
14	81	55
15	81	55
16	81	55
17	81	55
18	81	55
19	82	56
20	82	56
21	82	56
22	82	56
23	82	56
24	83	56
25	83	56
26	83	57
27	83	57
28	84	57
29	84	57
30	84	57
31	85	58

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	70	30
4	70	30
5	70	30
6	70	30
7	70	30
8	70	30
9	70	30
10	70	30
11	70	30
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	72	28
18	72	28
19	73	27
20	74	26
21	74	26
22	75	25
23	76	24
24	76	24
25	77	23
26	78	22
27	79	21
28	79	21
29	79	21
30	80	20
31	80	20

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

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	96	4
6	96	4
7	96	4
8	96	4
9	96	4
10	97	3
11	97	3
12	97	3
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	96	4
23	96	4
24	96	4
25	95	5
26	95	5
27	94	6
28	94	6
29	93	7
30	93	7
31	92	8