Biddeford weather in May

In May, Biddeford sees average daytime highs of 63°F and overnight lows near 47°F, with 2.9 in of precipitation across 10.1 wet days and about 14.5 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 59°F in the first days to 67°F by the end. The sky is clear or mostly clear about 24% 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 Biddeford's 12th-clearest and 8th-windiest month. For the whole year in context, see Biddeford's year-round climate.

Daytime high
63°
5th warmest
Overnight low
47°
8th coldest
Precipitation
2.9 in
10.1 wet days
Daylight
14 h 30 min
4:23 AM – 6:53 PM
Cloud cover
65%
12th clearest
Wind
7 mph
8th windiest
Solar energy
5.62 kWh/m²
Travel score
5.3
out of 10

Biddeford is city in York County, Maine, United States.

Density
139/km²
people per km²
Founded
1616

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 59°F in the first days to 67°F by the end.

A typical May day in Biddeford reaches about 63°F in the afternoon and slips back to 47°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 75°F. Set against its neighbours, May runs about 10°F warmer than April and about 10°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
15843
25843
35943
45944
55944
66044
76044
86045
96045
106145
116146
126146
136246
146246
156246
166347
176347
186347
196448
206448
216448
226549
236549
246549
256650
266650
276651
286751
296751
306752
316752

How May really feels in Biddeford

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.

Biddeford weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 19°3.39.46.69.10.0
Feb34° / 19°3.18.86.210.20.0
Mar41° / 27°4.110.65.511.60.3
Apr53° / 38°3.810.11.613.22.9
May63° / 47°2.910.10.114.55.3
Jun73° / 57°3.410015.26.6
Jul78° / 64°2.99.2014.96.8
Aug77° / 62°2.98.4013.87.1
Sep70° / 55°3.28.2012.36.8
Oct59° / 45°4.39.70.210.84.6
Nov48° / 35°3.59.21.39.51.7
Dec38° / 26°4.210.25.48.80.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 (%)
14060
24060
34060
44060
54060
63961
73961
83961
93961
103961
113961
123961
133961
143961
153961
163961
173961
183961
194060
203961
214060
224060
234159
244258
254159
264159
274159
284258
294159
304159
314258

Chance of precipitation in May

Any precipitation

Biddeford gets around 2.9 in of rain and snow over 10.1 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 33% and peaks near 34% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
431
531
631
731
832
932
1032
1132
1233
1333
1433
1533
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2733
2833
2933
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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
198200
297300
397300
497300
597300
696400
796400
896400
995410
1095410
1195410
1295410
1395410
1495410
1595410
1693520
1793520
1893520
1991630
2091630
2189740
2288741
2386851
2485951
25831061
26831061
27801172
28791272
29771382
30771382
31761482

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
47light breeze
57light breeze
67light breeze
77light breeze
87light breeze
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 4:42 AM to 4:10 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)
113.94:426:36
213.94:416:37
314.04:396:38
414.04:386:39
514.14:376:41
614.14:356:42
714.24:346:43
814.24:336:44
914.24:316:45
1014.34:306:46
1114.34:296:47
1214.44:286:49
1314.44:266:50
1414.44:256:51
1514.54:246:52
1614.54:236:53
1714.54:226:54
1814.64:216:55
1914.64:206:56
2014.64:196:57
2114.74:186:58
2214.74:176:59
2314.74:167:00
2414.84:157:01
2514.84:157:02
2614.84:147:03
2714.94:137:04
2814.94:127:05
2914.94:127:06
3014.94:117:07
3115.04:107:08

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.62 kWh/m².

For context, solar energy here swings from a low near 1.51 kWh/m² to a high of 6.12 kWh/m² in July across the year — May's 5.62 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Hazard calendar for Biddeford

In seasonPeak

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

Biddeford 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 Biddeford?

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

5.3
Sightseeing
5th-best month of the year
1.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Biddeford for sightseeing.

What to pack for Biddeford in May

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

In May, Biddeford sees daytime highs around 63°F and nights near 47°F. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Biddeford 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 64°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
Jun56Bracing
Jul62Cool
Aug64Cool
Sep61Cool
Oct55Bracing
Nov49Bracing
Dec45Bracing

UV index in Biddeford 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 Biddeford 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 Biddeford?

Biddeford sits at 43.5°N, 70.5°W, 69 ft above sea level, in United States. The nearest listed city is Saco, 0.6 mi away.

Topography around Biddeford

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

Within 2 miles, the terrain around Biddeford has only modest variations in elevation — a maximum elevation change of 236 ft around an average of 112 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 463 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,933 ft.

The land around Biddeford is covered by trees (64%) within 2 miles, trees (60%) and water (24%) within 10 miles, and trees (60%) and water (34%) within 50 miles.

2 miles
236 ft
10 miles
463 ft
50 miles
2,933 ft
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Saco 0.6 mi · West Scarborough 6.2 mi · South Portland Gardens 12 mi · Westbrook 14 mi · South Portland 15 mi · Portland 15 mi · Sanford 17 mi · Rochester 29 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 Biddeford (43.4926°, -70.4534°, elevation 69 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).