Hamilton climate

Name: Hamilton
Address: NZ

Hamilton is warmest in February, with average highs of 23 °C, and coldest in July, when nights average 5.6 °C. July is the wettest month (124 mm) and January the driest (68 mm). Figures are 1991–2020 climate normals.

Across a full year Hamilton averages 1,172 mm of rain, 13 days above 25 °C and 9 days below freezing.

New Zealand · population 192,100 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 23 °C
Coldest month July 5.6 °C
Driest month January 68 mm
Wettest month July 124 mm
Least cloud March 57 % cloud
Hottest on record January 30 °C
Coldest on record July -4.5 °C

What to expectHamilton through the year

Hamilton has a clear annual cycle: average daily highs run from 13 °C in July to 23 °C in February, a swing of 9.9 °C in mean temperature across the year.

Counted across a normal year, 13 days a year reach 25 °C, 0 of them reach 30 °C, 9 nights drop below freezing. The warmest reading in the 1991–2020 record is 30 °C, in January.

Rain is spread fairly evenly through the year, from 68 mm in January to 124 mm in July. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	22.7 °C	68 mm	60 %
February	23.4 °C	71 mm	59 %
March	21.6 °C	73 mm	57 %
April	18.8 °C	93 mm	60 %
May	16.0 °C	105 mm	60 %
June	13.8 °C	114 mm	60 %
July	13.1 °C	124 mm	60 %
August	13.6 °C	121 mm	61 %
September	15.1 °C	113 mm	64 %
October	16.6 °C	100 mm	64 %
November	18.5 °C	90 mm	65 %
December	20.8 °C	100 mm	66 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days below 0 °C
January	22.7 °C	14.3 °C	18.4 °C	30.3 °C	6.2 °C	5	0
February	23.4 °C	14.8 °C	18.9 °C	29.7 °C	5.9 °C	6	0
March	21.6 °C	13.0 °C	17.1 °C	29.7 °C	4.6 °C	2	0
April	18.8 °C	10.7 °C	14.5 °C	25.3 °C	0.1 °C	0	0
May	16.0 °C	8.7 °C	12.0 °C	21.6 °C	-3.3 °C	0	0
June	13.8 °C	6.5 °C	9.8 °C	18.9 °C	-4.2 °C	0	3
July	13.1 °C	5.6 °C	9.0 °C	17.3 °C	-4.5 °C	0	4
August	13.6 °C	6.1 °C	9.6 °C	17.8 °C	-3.4 °C	0	2
September	15.1 °C	7.6 °C	11.1 °C	20.8 °C	-2.2 °C	0	0
October	16.6 °C	9.2 °C	12.8 °C	22.0 °C	-1.1 °C	0	0
November	18.5 °C	10.7 °C	14.5 °C	26.1 °C	2.2 °C	0	0
December	20.8 °C	13.1 °C	16.8 °C	27.4 °C	4.1 °C	1	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	68 mm	9	14 h/day	60 %	75 %	22 km/h
February	71 mm	8	14 h/day	59 %	75 %	21 km/h
March	73 mm	8	12 h/day	57 %	77 %	20 km/h
April	93 mm	10	11 h/day	60 %	81 %	20 km/h
May	105 mm	12	10 h/day	60 %	84 %	21 km/h
June	114 mm	13	9.6 h/day	60 %	85 %	21 km/h
July	124 mm	13	9.8 h/day	60 %	85 %	22 km/h
August	121 mm	15	11 h/day	61 %	84 %	22 km/h
September	113 mm	14	12 h/day	64 %	82 %	24 km/h
October	100 mm	13	13 h/day	64 %	80 %	25 km/h
November	90 mm	11	14 h/day	65 %	77 %	25 km/h
December	100 mm	11	15 h/day	66 %	77 %	23 km/h

How Hamilton compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Hamilton	23 °C	5.6 °C	1,172 mm	13
Tauranga · New Zealand	22 °C	7.8 °C	1,339 mm	4
Auckland · New Zealand	23 °C	9.4 °C	1,043 mm	3
Wellington · New Zealand	19 °C	8.7 °C	888 mm	0

Where Hamilton ranks

Ranking	Position	Value
The coolest places in the world in August	19thof 50	14 °C
The coolest places in the world in July	23rdof 50	13 °C
The coolest places in the world in June	27thof 50	14 °C

Planning a trip? See the best time to visit Hamilton.

QuestionsCommon questions about Hamilton’s climate

When is the best time to visit Hamilton?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, March sit closest to 20 °C on average, February is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Hamilton get?

In February, the warmest month, daily highs average 23 °C. About 0 days a year pass 30 °C. The highest value in the 1991–2020 record is 30 °C.

How cold does it get in winter?

Nights average 5.6 °C in July, the coldest month. A normal year has 9 nights below freezing.

Which month is wettest in Hamilton?

July, averaging 124 mm over 13 days with rain. The driest month is January with 68 mm. The year as a whole averages 1,172 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Hamilton rather than what any particular week will bring. Individual years can differ substantially from the normal.

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: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. 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.