Rio Grande weather in April
In April, Rio Grande has daytime highs averaging 22 °C, nights around 19 °C, with 10 wet days, and a sea temperature of 22 °C. Figures are 1991–2020 climate normals.
- 21.9°C Average high
- 18.7°C Average low
- 10days Wet days
- 121mm Rainfall
- 21.8°C Sea temperature
- 11h Daylight
Daily temperatures through April
How April 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 April | 22.9 °C | 20.0 °C | 30 % |
| 11–20 April | 22.1 °C | 18.8 °C | 37 % |
| 21–30 April | 20.8 °C | 17.6 °C | 36 % |
- Average highs fall from 22.9 °C early in April to 20.8 °C by the end of it.
- Rain is most likely over days 11–20 of April (37 % of days) and least likely over days 1–10 (30 %).
What to expect
| Measure | Typical April | Share of the month |
|---|---|---|
| Days above 25 °C | 1.9 of 30 | 6 % |
| Days above 30 °C | 0.03 of 30 | 0 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 10 of 30 | 34 % |
Conditions in April
| Measure | Average |
|---|---|
| Mean temperature | 20 °C |
| Record high (1991–2020) | 31 °C |
| Record low (1991–2020) | 9.3 °C |
| Relative humidity | 77 % |
| Wind speed | 25 km/h |
| Cloud cover | 53 % |
April compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| February | 25.1 °C | 94 mm | 53 % |
| March | 24.2 °C | 104 mm | 51 % |
| April | 21.9 °C | 121 mm | 53 % |
| May | 18.7 °C | 104 mm | 58 % |
| June | 16.3 °C | 114 mm | 59 % |
See all twelve months for Rio Grande
- April is the 5th warmest month here.
- It is the 10th driest month of the year.
- It ranks 5th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 10 of 30 days — 34 % of the month.
- Nights are about 3.1 °C cooler than the middle of the day.
- The hottest April day on record since 1991 reached 31 °C, 8.6 °C above the usual daytime high.
- Beach score: 66 / 100 — see how this is calculated.
QuestionsApril in Rio Grande, answered
How warm is Rio Grande in April?
Daily highs average 22 °C and nights fall to about 19 °C, a spread of 3.1 °C between afternoon and dawn. That makes April the 5th warmest month of the year here.
Does it rain much in Rio Grande in April?
April averages 121 mm of rain, spread over about 10 of the 30 days — 34 % of the month. Cloud cover averages 53 % of the sky.
Is the sea warm enough to swim in April?
The sea averages 22 °C off Rio Grande in April. 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 April?
Rio Grande averages 11 hours between sunrise and sunset in April. 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.