Arrah weather in May
In May, Arrah has daytime highs averaging 38 °C, nights around 26 °C, with 5.1 wet days. Figures are 1991–2020 climate normals.
- 38.3°C Average high
- 26.3°C Average low
- 5.1days Wet days
- 28mm Rainfall
- 13h Daylight
Daily temperatures through May
How May 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 May | 38.1 °C | 25.5 °C | 12 % |
| 11–20 May | 38.6 °C | 26.5 °C | 13 % |
| 21–31 May | 38.2 °C | 26.7 °C | 23 % |
- Rain is most likely over days 21–31 of May (23 % of days) and least likely over days 1–10 (12 %).
What to expect
| Measure | Typical May | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 100 % |
| Days above 30 °C | 31 of 31 | 99 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 5.1 of 31 | 17 % |
Conditions in May
| Measure | Average |
|---|---|
| Mean temperature | 32 °C |
| Record high (1991–2020) | 45 °C |
| Record low (1991–2020) | 20 °C |
| Relative humidity | 51 % |
| Wind speed | 19 km/h |
| Cloud cover | 21 % |
May compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| March | 32.3 °C | 10 mm | 19 % |
| April | 37.5 °C | 12 mm | 20 % |
| May | 38.3 °C | 28 mm | 21 % |
| June | 36.2 °C | 180 mm | 59 % |
| July | 32.2 °C | 326 mm | 88 % |
See all twelve months for Arrah
- May is the warmest month in Arrah.
- It is the 7th driest month of the year.
- It ranks 6th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 5.1 of 31 days — 17 % of the month.
- Nights are about 12 °C cooler than the middle of the day.
- The hottest May day on record since 1991 reached 45 °C, 6.6 °C above the usual daytime high.
QuestionsMay in Arrah, answered
How warm is Arrah in May?
Daily highs average 38 °C and nights fall to about 26 °C, a spread of 12 °C between afternoon and dawn. That makes May the 1st warmest month of the year here.
Does it rain much in Arrah in May?
May averages 28 mm of rain, spread over about 5 of the 31 days — 17 % of the month. Cloud cover averages 21 % of the sky.
How long are the days in May?
Arrah averages 13 hours between sunrise and sunset in May. 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.