Nagaoka weather in February
In February, Nagaoka has daytime highs averaging 4.4 °C, nights around -2.6 °C, with 20 wet days, and a sea temperature of 11 °C. Figures are 1991–2020 climate normals.
- 4.4°C Average high
- -2.6°C Average low
- 20days Wet days
- 130mm Rainfall
- 10.6°C Sea temperature
- 11h Daylight
Daily temperatures through February
How February develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 February | 3.6 °C | -3.0 °C | 74 % |
| 11–20 February | 4.2 °C | -2.6 °C | 71 % |
| 21–28 February | 5.6 °C | -2.2 °C | 63 % |
- Average highs rise from 3.6 °C early in February to 5.6 °C by the end of it.
- Rain is most likely over days 1–10 of February (74 % of days) and least likely over days 21–28 (63 %).
What to expect
| Measure | Typical February | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 28 | 0 % |
| Days above 30 °C | 0 of 28 | 0 % |
| Days below 0 °C | 24 of 28 | 85 % |
| Days with more than 1 mm rain | 20 of 28 | 70 % |
Conditions in February
| Measure | Average |
|---|---|
| Mean temperature | 0.6 °C |
| Record high (1991–2020) | 18 °C |
| Record low (1991–2020) | -12 °C |
| Relative humidity | 82 % |
| Wind speed | 18 km/h |
| Cloud cover | 74 % |
February compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 3.5 °C | 183 mm | 77 % |
| February | 4.4 °C | 130 mm | 74 % |
| March | 8.6 °C | 126 mm | 69 % |
| April | 15.9 °C | 97 mm | 62 % |
| December | 6.8 °C | 187 mm | 74 % |
See all twelve months for Nagaoka
- February is the 11th warmest month here.
- It is the 5th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 20 of 28 days — 70 % of the month.
- Nights are about 7.0 °C cooler than the middle of the day.
- The hottest February day on record since 1991 reached 18 °C, 14 °C above the usual daytime high.
QuestionsFebruary in Nagaoka, answered
How warm is Nagaoka in February?
Daily highs average 4.4 °C and nights fall to about -2.6 °C, a spread of 7.0 °C between afternoon and dawn. That makes February the 11th warmest month of the year here.
Does it rain much in Nagaoka in February?
February averages 130 mm of rain, spread over about 20 of the 28 days — 70 % of the month. Cloud cover averages 74 % of the sky.
Is the sea warm enough to swim in February?
The sea averages 11 °C off Nagaoka in February. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in February?
Nagaoka averages 11 hours between sunrise and sunset in February. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.