Greenfield weather in May

In May, Greenfield sees average daytime highs of 74°F and overnight lows near 50°F, with 0.5 in of rain across 2.2 wet days and about 13.9 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 72°F in the first days to 77°F by the end. The sky is clear or mostly clear about 66% 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 18 min by month's end. Set against the rest of the year, May is Greenfield's 6th-clearest and 1st-windiest month. For the whole year in context, see Greenfield's year-round climate.

Daytime high
74°
6th warmest
Overnight low
50°
7th coldest
Rainfall
0.5 in
2.2 wet days
Daylight
13 h 54 min
5:04 AM – 6:59 PM
Cloud cover
30%
6th clearest
Wind
5 mph
1st windiest
Solar energy
7.75 kWh/m²
Travel score
8.7
out of 10

Greenfield is city in Monterey County, California, United States.

Density
3,107/km²
people per km²
Founded
1947

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 72°F in the first days to 77°F by the end.

A typical May day in Greenfield reaches about 74°F in the afternoon and slips back to 50°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 62°F and 86°F. Set against its neighbours, May runs about 7°F warmer than April and about 8°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17148
27148
37248
47248
57248
67249
77249
87349
97349
107349
117349
127349
137349
147349
157349
167349
177450
187450
197450
207450
217450
227450
237551
247551
257551
267651
277651
287651
297751
307752
317752

Greenfield 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
Jan58° / 40°3.57.69.84.5
Feb59° / 41°3.58.510.64.7
Mar63° / 43°2.67.511.75.9
Apr67° / 45°1.14.312.97.3
May74° / 50°0.52.213.98.7
Jun82° / 55°0.10.414.48.3
Jul87° / 60°0.00.314.26.4
Aug87° / 60°0.00.213.46.3
Sep83° / 58°0.10.712.27.9
Oct75° / 52°0.72.111.18.8
Nov64° / 44°1.24.210.16.8
Dec58° / 40°2.97.39.64.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% 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 21%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27327
37525
47525
57525
67426
77426
87426
97426
107426
117525
127624
137624
147723
157723
167822
177921
187921
198020
208020
218119
228218
238218
248416
258416
268416
278515
288614
298614
308614
318614

Chance of precipitation in May

Any precipitation

Greenfield gets around 0.5 in of rain over 2.2 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 7% and peaks near 9% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
19
29
39
48
58
68
78
88
98
109
119
129
138
148
158
168
178
188
198
207
217
227
236
246
255
265
274
284
294
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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
28991
29991
30991
31991

Wind in May

Winds average 5 mph in May, the windiest month of the year.

Across May, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 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 5:18 AM to 4:54 AM, and sunset from 6:46 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:186:46
213.55:176:47
313.55:166:48
413.65:156:49
513.65:146:50
613.65:136:50
713.75:126:51
813.75:116:52
913.75:106:53
1013.85:096:54
1113.85:086:55
1213.85:076:56
1313.85:066:56
1413.95:056:57
1513.95:046:58
1613.95:046:59
1714.05:037:00
1814.05:027:01
1914.05:017:01
2014.05:007:02
2114.15:007:03
2214.14:597:04
2314.14:587:05
2414.14:587:05
2514.14:577:06
2614.24:577:07
2714.24:567:08
2814.24:567:08
2914.24:557:09
3014.34:557:10
3114.34:547:10

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.75 kWh/m².

For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 8.4 kWh/m² in June across the year — May's 7.75 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.4Intense
37.4Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.6Intense
97.6Intense
107.6Intense
117.7Intense
127.7Intense
137.7Intense
147.7Intense
157.7Intense
167.8Intense
177.8Intense
187.8Intense
197.8Intense
207.8Intense
217.9Intense
227.9Intense
237.9Intense
247.9Intense
258.0Intense
268.0Intense
278.0Intense
288.0Intense
298.1Intense
308.1Intense
318.1Intense
Planning a trip in May

Is May a good time to visit Greenfield?

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

8.7
Sightseeing
2nd-best month of the year
6.8
Beach & pool
6th-best month of the year

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

What to pack for Greenfield in May

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

In May, Greenfield sees daytime highs around 74°F and nights near 50°F. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Greenfield in May

The nearest coast averages about 54°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 25 mi away) is warmest in September at about 59°F and coldest in April near 54°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
Jan55Bracing
Feb55Bracing
Mar55Bracing
Apr54Bracing
May54Bracing
Jun55Bracing
Jul57Bracing
Aug59Bracing
Sep59Cool
Oct59Cool
Nov58Bracing
Dec56Bracing

UV index in Greenfield 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 Greenfield peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 21UV 11Dec 14UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep7Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Greenfield 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 Greenfield is worst in September — around 27 µg/m³ PM2.5 (moderate), about 7.0× the cleanest month (December, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1027 µg/m³Dec 174 µg/m³
PM2.5 (µg/m³)Level
Jan4Good
Feb5Good
Mar5Good
Apr5Good
May5Good
Jun5Good
Jul16Moderate
Aug25Moderate
Sep27Moderate
Oct6Good
Nov4Good
Dec4Good
Location & terrain

Where is Greenfield?

Greenfield sits at 36.3°N, 121.2°W, 289 ft above sea level, in United States. The nearest listed city is Soledad, 8.7 mi away.

Topography around Greenfield

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

Within 2 miles, the terrain around Greenfield has only modest variations in elevation — a maximum elevation change of 131 ft around an average of 279 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,671 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,883 ft.

The land around Greenfield is covered by cropland (67%) within 2 miles, grassland (53%) and cropland (22%) within 10 miles, and grassland (47%) and trees (23%) within 50 miles.

2 miles
131 ft
10 miles
3,671 ft
50 miles
5,883 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Soledad 8.7 mi · Big Sur 32 mi · Salinas 34 mi · Hollister 38 mi · Seaside 39 mi · Prunedale 39 mi · Marina 40 mi · Monterey 41 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 Greenfield (36.3208°, -121.2438°, elevation 289 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).