Northwest One weather in May

In May, Northwest One sees average daytime highs of 74°F and overnight lows near 56°F, with 3.8 in of rain across 11 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 71°F in the first days to 79°F by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Northwest One's 12th-clearest and 7th-windiest month. For the whole year in context, see Northwest One's year-round climate.

Daytime high
74°
5th warmest
Overnight low
56°
8th coldest
Rainfall
3.8 in
11 wet days
Daylight
14 h 06 min
5:01 AM – 7:08 PM
Cloud cover
63%
12th clearest
Wind
6 mph
7th windiest
Solar energy
5.71 kWh/m²
Travel score
6.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 71°F in the first days to 79°F by the end.

A typical May day in Northwest One reaches about 74°F in the afternoon and slips back to 56°F overnight — a 19°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 9°F warmer than April and about 9°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17051
27152
37152
47152
57153
67253
77253
87253
97254
107354
117354
127355
137355
147455
157455
167456
177456
187556
197557
207557
217657
227658
237758
247758
257759
267859
277860
287860
297960
307961
317961

How May really feels in Northwest One

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.

Northwest One weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan43° / 28°3.18.62.99.60.4
Feb46° / 29°2.98.52.810.51.2
Mar55° / 36°3.910.31.911.73.4
Apr66° / 47°3.410.10.1135.9
May74° / 56°3.811014.16.6
Jun83° / 65°3.511.3014.75.4
Jul88° / 70°4.112.1014.44.3
Aug85° / 68°3.510.1013.55.1
Sep79° / 61°4.39.3012.36.8
Oct67° / 49°3.47.80116.6
Nov56° / 39°2.97.50.29.94.1
Dec47° / 32°3.58.81.69.31.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24357
34357
44357
54456
64456
74456
84456
94456
104357
114357
124357
134258
144258
154357
164357
174258
184258
194258
204258
214159
224159
234258
244258
254258
264357
274456
284456
294456
304456
314555

Chance of precipitation in May

Any precipitation

Northwest One gets around 3.8 in of rain over 11 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 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
234
334
434
534
634
734
835
935
1035
1135
1235
1335
1435
1535
1635
1736
1836
1936
2036
2136
2236
2336
2436
2536
2636
2735
2835
2935
3035
3135

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
17516810
27417810
37317910
471181010
570191010
668191120
766201220
866201220
965201320
1063201430
1163201430
1261201540
1362191540
1461191550
1559191660
1659191660
1757191770
1856191780
1954191890
2053191990
21511919101
22491920111
23481921121
24461921131
25441921141
26432021151
27422022151
28402122161
29392122171
30382122182
31372222182

Wind in May

Winds average 6 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
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 36 min at the start of May to 14 h 30 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 5:17 AM to 4:50 AM, and sunset from 6:53 PM to 7:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:176:53
213.65:166:54
313.75:156:55
413.75:136:56
513.85:126:57
613.85:116:58
713.85:106:59
813.95:097:00
913.95:087:01
1013.95:077:02
1114.05:067:03
1214.05:057:04
1314.05:047:05
1414.15:037:06
1514.15:027:07
1614.15:017:08
1714.15:007:09
1814.24:597:10
1914.24:587:11
2014.24:577:11
2114.34:577:12
2214.34:567:13
2314.34:557:14
2414.34:547:15
2514.44:547:16
2614.44:537:16
2714.44:537:17
2814.44:527:18
2914.54:517:19
3014.54:517:20
3114.54:507:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.71 kWh/m².

For context, solar energy here swings from a low near 1.95 kWh/m² to a high of 6.14 kWh/m² in June across the year — May's 5.71 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Northwest One

In seasonPeak

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

Northwest One 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 Northwest One?

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

6.6
Sightseeing
2nd-best month of the year
5.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Northwest One for sightseeing.

What to pack for Northwest One in May

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

In May, Northwest One sees daytime highs around 74°F and nights near 56°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Northwest One in May

The nearest coast averages about 58°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 34 mi away) is warmest in August at about 78°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 16 to Oct 6 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb37Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Northwest One 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 Northwest One peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 9Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Northwest One 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 Northwest One is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Northwest One?

Northwest One sits at 38.9°N, 77.0°W, 49 ft above sea level, in United States. The nearest listed city is Mount Vernon Triangle, 0.0 mi away.

Topography around Northwest One

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

Within 2 miles, the terrain around Northwest One has only modest variations in elevation — a maximum elevation change of 295 ft around an average of 95 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 509 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,060 ft.

The land around Northwest One is covered by artificial surfaces (82%) within 2 miles, trees (59%) and artificial surfaces (30%) within 10 miles, and trees (58%) within 50 miles.

2 miles
295 ft
10 miles
509 ft
50 miles
2,060 ft
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Mount Vernon Triangle 0.0 mi · NoMa 0.6 mi · Shaw 0.6 mi · Downtown DC 0.6 mi · H Street NE 0.6 mi · Capitol Hill 1.2 mi · Washington, D.C. 1.2 mi · Golden Triangle 1.9 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 Northwest One (38.9043°, -77.012°, 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. 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).