South Portland Gardens weather in May

In May, South Portland Gardens sees average daytime highs of 56°F and overnight lows near 47°F, with 3.9 in of precipitation across 11 wet days and about 14.5 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 53°F in the first days to 60°F by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of May to 15 hours by month's end. Set against the rest of the year, May is South Portland Gardens's 12th-clearest and 8th-windiest month. For the whole year in context, see South Portland Gardens's year-round climate.

Daytime high
56°
5th warmest
Overnight low
47°
7th coldest
Precipitation
3.9 in
11 wet days
Daylight
14 h 30 min
4:22 AM – 6:53 PM
Cloud cover
65%
12th clearest
Wind
9 mph
8th windiest
Solar energy
5.53 kWh/m²
Travel score
3.7
out of 10

South Portland Gardens is human settlement in Cumberland County, Maine, United States of America.

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 53°F in the first days to 60°F by the end.

A typical May day in South Portland Gardens reaches about 56°F in the afternoon and slips back to 47°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 64°F. Set against its neighbours, May runs about 9°F warmer than April and about 9°F cooler than June.

30°40°50°60°70°151015202531
Avg high (°F)Avg low (°F)
15243
25243
35344
45344
55344
65344
75445
85445
95445
105446
115546
125546
135546
145546
155647
165647
175647
185647
195748
205748
215749
225849
235849
245849
255950
265950
275950
286051
296051
306051
316052

How May really feels in South Portland Gardens

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.

South Portland Gardens 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 daysSnow daysDaylight (hours)Travel score
Jan32° / 20°3.99.96.99.10.0
Feb33° / 21°3.68.96.510.20.0
Mar38° / 28°4.610.95.611.60.0
Apr47° / 38°4.710.71.913.21.6
May56° / 47°3.9110.114.53.7
Jun65° / 56°4.010.3015.25.7
Jul71° / 63°3.19.2014.96.7
Aug71° / 63°3.28.4013.86.9
Sep65° / 57°3.78.7012.36.2
Oct56° / 47°5.410.60.210.83.8
Nov46° / 37°4.510.41.49.51.3
Dec37° / 28°4.9115.88.80.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44060
54060
64060
74060
84060
94060
104060
114060
124060
134060
144060
154060
164060
174060
184060
194159
204159
214060
224060
234159
244258
254258
264159
274159
284159
294159
304060
314060

Chance of precipitation in May

Any precipitation

South Portland Gardens gets around 3.9 in of rain and snow over 11 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 37% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
435
535
636
736
836
936
1036
1136
1236
1336
1437
1537
1636
1736
1836
1936
2036
2136
2235
2335
2435
2535
2634
2734
2834
2934
3034
3134

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.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
810000
910000
109910
119910
129910
139910
149910
159820
169820
179820
189730
199730
209640
219550
229460
239460
249271
259181
269091
2789101
2888111
2988111
3087121
3186131

Wind in May

Winds average 9 mph in May.

Across May, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 54 min at the start of May to 15 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 4:41 AM to 4:09 AM, and sunset from 6:36 PM to 7:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:416:36
213.94:406:37
314.04:386:38
414.04:376:39
514.14:366:40
614.14:346:42
714.24:336:43
814.24:326:44
914.24:306:45
1014.34:296:46
1114.34:286:47
1214.44:276:48
1314.44:256:50
1414.44:246:51
1514.54:236:52
1614.54:226:53
1714.64:216:54
1814.64:206:55
1914.64:196:56
2014.74:186:57
2114.74:176:58
2214.74:166:59
2314.84:157:00
2414.84:147:01
2514.84:147:02
2614.84:137:03
2714.94:127:04
2814.94:117:05
2914.94:117:06
3014.94:107:07
3115.04:097:08

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.53 kWh/m².

For context, solar energy here swings from a low near 1.46 kWh/m² to a high of 6.02 kWh/m² in July across the year — May's 5.53 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Hazard calendar for South Portland Gardens

In seasonPeak

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

South Portland Gardens sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit South Portland Gardens?

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

3.7
Sightseeing
6th-best month of the year
0.1
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in South Portland Gardens.

What to pack for South Portland Gardens in May

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

In May, South Portland Gardens sees daytime highs around 56°F and nights near 47°F. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near South Portland Gardens in May

The nearest coast averages about 48°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 9 mi away) is warmest in August at about 63°F and coldest in March near 38°F.

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

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar38Bracing
Apr42Bracing
May48Bracing
Jun55Bracing
Jul62Cool
Aug63Cool
Sep60Cool
Oct54Bracing
Nov49Bracing
Dec45Bracing

UV index in South Portland Gardens in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in South Portland Gardens peaks around July 12 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateModerateLowJul 12UV 7Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7High
Jun7High
Jul7Very high
Aug4Moderate
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is South Portland Gardens?

South Portland Gardens sits at 43.6°N, 70.3°W, 49 ft above sea level, in United States. The nearest listed city is Portland, 3.1 mi away.

Topography around South Portland Gardens

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

Within 2 miles, the terrain around South Portland Gardens has only modest variations in elevation — a maximum elevation change of 210 ft around an average of 59 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 545 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,933 ft.

The land around South Portland Gardens is covered by trees (44%) and artificial surfaces (31%) within 2 miles, trees (51%) and water (29%) within 10 miles, and trees (62%) and water (33%) within 50 miles.

2 miles
210 ft
10 miles
545 ft
50 miles
2,933 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Portland 3.1 mi · South Portland 3.7 mi · Westbrook 3.7 mi · West Scarborough 6.2 mi · Saco 11 mi · Biddeford 12 mi · Brunswick 26 mi · Sanford 27 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 South Portland Gardens (43.639°, -70.3153°, elevation 49 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).