Monthly Climate
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Best time to visit Grand Rapids

September is the best time to visit Grand Rapids for general sightseeing, with average highs of 22 °C and about 9 wet days. The comfortable season runs roughly May 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 September comfort 91/100
The least cloud July 49 % average cloud cover
The least rain February 50 mm
Warmth July 27 °C
Cooler weather January -0.9 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 September 91 22 °C 9
2 June 85 25 °C 11
3 May 83 20 °C 11
4 August 83 26 °C 10
5 July 79 27 °C 11
6 October 67 15 °C 11
7 April 57 14 °C 12
8 November 39 7.9 °C 9
9 March 32 6.6 °C 9
10 February 29 0.5 °C 8
11 December 26 2.0 °C 10
12 January 25 -0.9 °C 11

When to think twice

January scores lowest with about 11 wet days and highs near -0.9 °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 -0.9 °C 63 mm 82 %
February 0.5 °C 50 mm 72 %
March 6.6 °C 63 mm 63 %
April 13.7 °C 101 mm 63 %
May 20.1 °C 109 mm 60 %
June 25.2 °C 100 mm 55 %
July 27.1 °C 96 mm 49 %
August 26.2 °C 94 mm 50 %
September 22.4 °C 77 mm 50 %
October 15.3 °C 88 mm 61 %
November 7.9 °C 70 mm 72 %
December 2.0 °C 60 mm 82 %

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.