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Weather by month for popular destinations

A full-year weather calendar for 6 destinations: a rating for every month, air and sea temperature, rainfall and sunshine from 2015–2024 climate normals. Good weather in December: Vietnam, Thailand, Dubai (UAE).

Climate normals checked September 29, 2026 · Source: Open-Meteo (ERA5) · How we calculate

Weather by destination

How to use it

  1. Find a destination and read the month colours: green is in season, red is off-season.
  2. Tap a month to see the weather in that country for that month, region by region.
  3. Open the country table for highs and lows, sea temperature, rainfall, rainy days, humidity and sunshine for all 12 months.
  4. Compare destinations for your month in “Where to go”.

Weather by month: FAQ

Where does the weather data come from?

From the ERA5 reanalysis via Open-Meteo: 2015–2024 averages for 2–4 points in each country. Sea temperature comes from Open-Meteo Marine. These are climate normals, not a forecast.

Where is it warm and dry in December?

By our rating: Vietnam, Thailand, Dubai (UAE). See “Where to go” for the ranked list with temperatures.

How is the month rating worked out?

From three factors: highs of 75–91°F (24–33°C), under 80 mm (3.1 in) of rain a month, and a sea of 77°F (25°C) or warmer for beach regions. A country's rating follows its best region.

Where the data comes from

  • Air temperature, rainfall, humidity — ERA5 reanalysis (Copernicus / ECMWF) via Open-Meteo, averaged over 2015–2024. Each region uses one point: the resort or city in its caption.
  • Sea temperature — Open-Meteo Marine, average sea surface temperature for 2023–2026 (the source has no longer record yet).
  • Sunshine — sunshine duration from the same ERA5 reanalysis (Open-Meteo), average hours of sun per day for the month, 2015–2024.
  • Rainy days — days with at least 1 mm (0.04 in) of rain. Reanalysis picks up light rain more often than weather stations, so treat this as an upper bound.
  • Month rating — one rule for every destination, based on three factors: day highs (ideal 75–91°F / 24–33°C), monthly rainfall (ideal under 80 mm / 3.1 in) and, for beach regions, sea temperature (ideal 77°F / 25°C or warmer). All ideal means Excellent; one slightly weaker factor means Good. Mixed means heavy rain (150 mm / 5.9 in or more), highs above 97°F (36°C) or a sea below 70°F (21°C). Off-season means highs of 100°F (38°C) or more, cold below 54°F (12°C), over 350 mm (13.8 in) of rain, or several problems at once. A country's rating follows its best region, so check the regional table.
  • Licence — weather data by Open-Meteo.com under CC BY 4.0; ERA5 reanalysis by the Copernicus Climate Change Service / ECMWF. The normals are precomputed and stored on this site, so the page sends no requests to the source.

Checked September 29, 2026. Climate normals are refreshed yearly and the notes every 90 days. These are long-term averages, not a forecast: any given year can differ.

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