Niiza weather in July
In July, Niiza has daytime highs averaging 29 °C, nights around 22 °C, with 16 wet days. Figures are 1991–2020 climate normals.
- 28.6°C Average high
- 22.1°C Average low
- 16days Wet days
- 179mm Rainfall
- 14h Daylight
Daily temperatures through July
How July 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 July | 27.3 °C | 21.0 °C | 55 % |
| 11–20 July | 28.7 °C | 22.1 °C | 52 % |
| 21–31 July | 29.5 °C | 22.9 °C | 44 % |
- Average highs rise from 27.3 °C early in July to 29.5 °C by the end of it.
- Rain is most likely over days 1–10 of July (55 % of days) and least likely over days 21–31 (44 %).
What to expect
| Measure | Typical July | Share of the month |
|---|---|---|
| Days above 25 °C | 26 of 31 | 85 % |
| Days above 30 °C | 11 of 31 | 36 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 16 of 31 | 50 % |
Conditions in July
| Measure | Average |
|---|---|
| Mean temperature | 25 °C |
| Record high (1991–2020) | 40 °C |
| Record low (1991–2020) | 15 °C |
| Relative humidity | 83 % |
| Wind speed | 16 km/h |
| Cloud cover | 76 % |
July compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| May | 22.2 °C | 141 mm | 69 % |
| June | 24.9 °C | 181 mm | 81 % |
| July | 28.6 °C | 179 mm | 76 % |
| August | 30.0 °C | 144 mm | 67 % |
| September | 26.1 °C | 211 mm | 69 % |
See all twelve months for Niiza
- July is the 2nd warmest month here.
- It is the 9th driest month of the year.
- It ranks 11th for least cloud cover.
- Days last about 14 hours from sunrise to sunset.
- It rains on 16 of 31 days — 50 % of the month.
- Nights are about 6.5 °C cooler than the middle of the day.
- The hottest July day on record since 1991 reached 40 °C, 11 °C above the usual daytime high.
Nearby destinations in July
| Destination | Avg high | Wet days | Sea |
|---|---|---|---|
| Niiza | 29 °C | 16 | – |
| Tokorozawa | 28 °C | 16 | – |
| Kawagoe | 28 °C | 14 | – |
| Saitama | 29 °C | 14 | – |
| Kawaguchi | 29 °C | 13 | 23 |
| Tokyo | 28 °C | 13 | 23 |
QuestionsJuly in Niiza, answered
How warm is Niiza in July?
Daily highs average 29 °C and nights fall to about 22 °C, a spread of 6.5 °C between afternoon and dawn. That makes July the 2nd warmest month of the year here.
Does it rain much in Niiza in July?
July averages 179 mm of rain, spread over about 16 of the 31 days — 50 % of the month. Cloud cover averages 76 % of the sky.
How long are the days in July?
Niiza averages 14 hours between sunrise and sunset in July. 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.