Nagai weather in February

In February, Nagai sees average daytime highs of 1°C and overnight lows near -5°C, with 137 mm of precipitation across 20.6 wet days and about 10.5 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 0°C in the first days to 2°C by the end. The sky is clear or mostly clear about 5% of the time in February, and the air most often feels dry.

Daylight stretches from about 10 h 06 min at the start of February to 11 hours by month's end. Set against the rest of the year, February is Nagai's 8th-clearest and 1st-windiest month. For the whole year in context, see Nagai's year-round climate.

Daytime high
11th warmest
Overnight low
-5°
2nd coldest
Precipitation
137 mm
20.6 wet days
Daylight
10 h 30 min
6:39 AM – 5:10 PM
Cloud cover
76%
8th clearest
Wind
11 km/h
1st windiest
Solar energy
3.12 kWh/m²
Travel score
0.0
out of 10

Nagai is city in Yamagata Prefecture, Japan.

Density
145/km²
people per km²
Founded
1954

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

Temperature in February

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 0°C in the first days to 2°C by the end.

A typical February day in Nagai reaches about 1°C in the afternoon and slips back to -5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -3°C and 5°C. Set against its neighbours, February runs about 1°C warmer than January and about 3°C cooler than March.

-10°-5°10°151015202528
Avg high (°C)Avg low (°C)
10-5
20-5
31-5
41-5
51-5
61-5
71-5
81-5
91-5
101-5
111-5
121-5
131-5
141-5
151-5
161-5
171-4
182-4
192-4
202-4
212-4
222-4
232-4
242-4
252-4
262-4
272-4
283-4

How February really feels in Nagai

Once humidity and wind are folded in, February averages 0 days that feel above 32°C and 28 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
28
wind chill below the day's low

The story in February is cold — wind chill drags the overnight "feels like" below the raw low.

Nagai weather by month

How February compares with the rest of the year at a glance. February is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°19024.425.29.70.0
Feb / -5°13720.620.510.50.0
Mar / -2°14619.415.611.70.2
Apr11° / 11515.14.4132.5
May18° / 11614.20.1145.1
Jun22° / 14°15515.2014.65.4
Jul25° / 18°24119.9014.45.1
Aug26° / 19°18317.4013.55.4
Sep22° / 15°15515.3012.35.5
Oct16° / 13914.30.1114.5
Nov10° / 13417.55.59.91.7
Dec / -3°18123.219.29.40.0

Cloud cover in February

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in February.

Beyond those clear spells, partly cloudy skies cover about 12% of February, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202528
Clearer (%)Cloudier (%)
11684
21783
31783
41783
51684
61684
71585
81585
91585
101486
111486
121486
131486
141486
151585
161585
171684
181684
191783
201981
211981
222080
232080
242179
252179
262278
272278
282278

Chance of precipitation in February

Any precipitationSnow

Nagai gets around 137 mm of rain and snow over 20.6 wet days in February. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 74% and peaks near 80% on the wettest days, and about 21 days bring snow. The odds ease toward the end of the month.

0%20%40%60%80%151015202528
Rain chance (%)Snow chance (%)
18082
28081
37981
47981
57981
67980
77880
87879
97779
107778
117678
127677
137576
147576
157475
167474
177373
187272
197271
207170
217069
227068
236967
246866
256865
266764
276762
286662

Humidity in February

DryComfortableHumidMuggyOppressiveMiserable

Most of February feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, February 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%151015202528
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100

Wind in February

Winds average 11 km/h in February, the windiest month of the year.

Across February, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202528
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm

Sunrise & sunset in February

DaylightNight

Daylight runs from about 10 h 06 min at the start of February to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over February. Sunrise moves from 6:52 AM to 6:22 AM, and sunset from 4:55 PM to 5:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202528
Daylight (h)Sunrise (AM)Sunset (PM)
110.16:524:55
210.16:514:56
310.16:504:57
410.16:494:58
510.26:494:59
610.26:485:00
710.26:475:02
810.36:465:03
910.36:455:04
1010.46:445:05
1110.46:435:06
1210.46:425:07
1310.56:415:08
1410.56:405:09
1510.56:395:10
1610.66:375:11
1710.66:365:13
1810.66:355:14
1910.76:345:15
2010.76:335:16
2110.86:315:17
2210.86:305:18
2310.86:295:19
2410.96:285:20
2510.96:265:21
2611.06:255:22
2711.06:245:23
2811.06:225:24

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 3.12 kWh/m².

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 5.35 kWh/m² in May across the year — February's 3.12 kWh/m² falls in the middle.

01234151015202528
Solar energy (kWh/m²)Level
12.6Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.8Moderate
62.8Moderate
72.8Moderate
82.9Moderate
92.9Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.1Moderate
143.1Moderate
153.1Moderate
163.2Moderate
173.2Moderate
183.2Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.6Moderate
Planning a trip in February

Hazard calendar for Nagai

In seasonPeak

In February, Nagai sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Nagai sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is February a good time to visit Nagai?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

February is a weaker month for outdoor sightseeing in Nagai.

What to pack for Nagai in February

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

In February, Nagai sees daytime highs around 1°C and nights near -5°C. Pack a warm layer, a heavy coat and rain gear. About 21 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Nagai in February

The nearest coast averages about 10°C in February — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 58 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 21 to Oct 29 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar9Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Bracing

UV index in Nagai in February

LowModerateHighVery highExtreme

Clear-sky midday UV in February peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nagai peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Nagai in February

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.

Air quality in Nagai is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1622 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Nagai?

Nagai sits at 38.1°N, 140.0°E, 204 m above sea level, in Japan. The nearest listed city is Nanyō, 10 km away.

Topography around Nagai

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nagai.

Within 3 km, the terrain around Nagai has significant variations in elevation — a maximum elevation change of 254 m around an average of 224 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,329 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,110 m.

The land around Nagai is covered by cropland (41%), trees (28%) and artificial surfaces (24%) within 3 km, trees (72%) and cropland (21%) within 16 km, and trees (74%) within 80 km.

3 km
254 m
16 km
1,329 m
80 km
2,110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
February weather nearby: Nanyō 10 km · Takahata 18 km · Kaminoyama 22 km · Yonezawa 23 km · Yamagata 32 km · Sagae 36 km · Tendō 40 km · Yachi 43 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Nagai (38.1036°, 140.035°, elevation 204 m), 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).