# Weather in Mallorca on 21 September

> On 21 September Palma de Mallorca averages 27.7 °C by day and 20.8 °C at night. Measurements for every 21 September from 2011 to 2025.

Canonical: https://wettermallorca.com/en/september/21/
Updated on: 2026-10-02

What 21 September was like in Palma de Mallorca from 2011 to 2025: averages, records and every single measurement.

## In short

On 21 September Palma de Mallorca reaches an average of 27.7 °C by day and 20.8 °C at night. In 3 of 15 years at least 1 mm of rain fell on this day. The highest value was 30.4 °C in 2019, the lowest 18.4 °C in 2015. These are averages for 2011 to 2025, not a forecast.

## 21 September, year by year

Year | High | Low | Rainfall
2025 | 29.0 °C | 23.6 °C | 2.3 mm
2024 | 25.9 °C | 20.2 °C | 1.9 mm
2023 | 27.8 °C | 21.7 °C | 0.0 mm
2022 | 28.7 °C | 22.2 °C | 0.0 mm
2021 | 24.0 °C | 19.0 °C | 0.2 mm
2020 | 28.1 °C | 21.6 °C | 0.0 mm
2019 | 30.4 °C | 24.2 °C | 0.0 mm
2018 | 29.9 °C | 20.3 °C | 0.0 mm
2017 | 26.3 °C | 18.8 °C | 0.0 mm
2016 | 27.2 °C | 18.5 °C | 0.1 mm
2015 | 27.0 °C | 18.4 °C | 0.0 mm
2014 | 29.2 °C | 23.8 °C | 0.0 mm
2013 | 26.4 °C | 19.4 °C | 5.2 mm
2012 | 29.8 °C | 20.4 °C | 0.0 mm
2011 | 26.3 °C | 19.6 °C | 0.0 mm
In 2025 this day measured 29.0 °C by day and 23.6 °C at night.

## What suits 21 September in Mallorca

Swimming weather: beach, cove or a day on a boat. Matching pages in the travel planner: [Beaches](https://mallorcaplaner.com/beaches/), [Boat trips](https://mallorcaplaner.com/boat-trips/), [With kids](https://mallorcaplaner.com/with-kids/).

## The day in the calendar

[20 September](/en/september/20/) · [All of September](https://wettermallorca.com/en/september/) · [22 September](/en/september/22/)

## Frequently asked questions

### How warm is it in Mallorca on 21 September?

On 21 September the average daytime high in Palma de Mallorca is 27.7 °C and the average low is 20.8 °C. These are averages for 2011 to 2025 at the station Palma Puerto (AEMET B228), not a forecast for a particular year.

### Does it often rain in Mallorca on 21 September?

In 3 of 15 years between 2011 and 2025 at least 1 mm of rain fell in Palma de Mallorca on 21 September. A rain day here means a day with 1 mm of precipitation or more.

### What was the weather like in Mallorca on 21 September 2025?

In 2025 this day measured 29.0 °C by day and 23.6 °C at night. The measurement comes from the station Palma Puerto (AEMET B228).

### What was the warmest 21 September in Mallorca since 2011?

The warmest 21 September since 2011 in Palma de Mallorca was in 2019 with 30.4 °C. The coldest low on this date was 18.4 °C in 2015.

## Sources

- [AEMET OpenData, daily climate values](https://opendata.aemet.es/), checked on 2026-10-03
- [AEMET station inventory, station B228 Palma, Puerto (39.5542 N, 2.6253 E, 3 m)](https://opendata.aemet.es/centrodedescargas/productosAEMET), checked on 2026-10-03
- [NOAA OISST v2.1, daily sea surface temperature, via NOAA CoastWatch ERDDAP](https://coastwatch.pfeg.noaa.gov/erddap/griddap/ncdcOisst21Agg_LonPM180.html), checked on 2026-10-02
- [MET Norway, Locationforecast 2.0](https://api.met.no/weatherapi/locationforecast/2.0/documentation), checked on 2026-10-02