Monthly Climate
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Best time to visit Pomona

November is the best time to visit Pomona for general sightseeing, with average highs of 22 °C and about 3 wet days. The comfortable season runs roughly March to June.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking November comfort 97/100
The least cloud August 14 % average cloud cover
The least rain August 1 mm
Warmth August 32 °C
Cooler weather December 18 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 November 97 22 °C 3
2 April 95 23 °C 4
3 May 95 25 °C 2
4 October 91 27 °C 3
5 March 89 20 °C 7
6 June 87 28 °C 0
7 December 85 18 °C 5
8 January 84 18 °C 6
9 February 84 19 °C 7
10 September 78 31 °C 1
11 July 78 31 °C 1
12 August 74 32 °C 0

When to think twice

August scores lowest with about 0 wet days and highs near 32 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 18.2 °C 91 mm 47 %
February 18.6 °C 99 mm 49 %
March 20.4 °C 65 mm 48 %
April 22.8 °C 27 mm 40 %
May 24.9 °C 12 mm 36 %
June 28.1 °C 3 mm 22 %
July 31.3 °C 2 mm 18 %
August 32.5 °C 1 mm 14 %
September 31.2 °C 4 mm 17 %
October 26.9 °C 20 mm 27 %
November 22.1 °C 26 mm 35 %
December 17.9 °C 63 mm 43 %

Data sources and method

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: comfort score, beach score, season boundaries. 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.