Weather in Christchurch in July

A hard month. July asks something of you. Go in knowing what. Highs sit at 10.7 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

July ranks 12 of 12 — near the bottom of Christchurch's year. February is the month that works, and the swing between the two is 36 points, which is a different holiday rather than a slightly better one.

Rain on 13 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 10.7 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 3 nights fall below freezing. Across the twenty years measured, the hottest July day reached 19.1 °C and the coldest night fell to -2.4 °C, and the wettest single day dropped 47 mm — roughly 65% of the month's rain in one day.

July is moderately variable: 24 mm in the driest year against 162 mm in the wettest, around an average of 72 mm. Roughly two Julys in three land near that average, and the third does something else entirely.

Wind is light at 8.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 88%, which at 10.7 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How July sits in the year

Temperatures hold steady either side: 11.3 °C in June, 10.7 here, 12.2 in August. Nothing about the timing within the month matters much.

Daylight in July

July sits at the dark end of Christchurch's year — 9.2 hours of daylight against 15.4 at midsummer, gaining 0.7 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 10.3 °C in July — too cold to swim without a wetsuit. The sea peaks at 15.9 °C in February and bottoms out at 9.9 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in Christchurch versus nearby

If Christchurch is one option among several, the nearby comparison is worth making. Timaru is close enough to be a coin toss — within a degree on temperature, 4 days less rain. Greymouth is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: July is a compromise. February is 36 points better and is what Christchurch is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Christchurch

See all twelve months in Christchurch, or where else to go in July.