Weather in Christchurch in January

Prime time. January is about as good as Christchurch gets. Highs average 24.3 °C, lows 12 °C, and rain falls on 12 days — nothing in the month is working against you.

January ranks 3 of 12 in Christchurch. Only February scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 12 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest January day reached 35.7 °C and the coldest night fell to 6 °C, and the wettest single day dropped 56 mm — roughly 85% of the month's rain in one day.

January is moderately variable: 28 mm in the driest year against 158 mm in the wettest, around an average of 66 mm. Roughly two Januarys in three land near that average, and the third does something else entirely.

Wind is light at 11.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 66%.

How January sits in the year

Temperatures hold steady either side: 22.1 °C in December, 24.3 here, 24 in February. Nothing about the timing within the month matters much.

Daylight in January

January is at or near the longest days of Christchurch's year: 15.1 hours of daylight, losing 0.8 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 15.3 °C in January — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

January 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 — 4.6 °C cooler, 1 day less rain. Greymouth is the weaker option in January — 5.1 °C cooler, 3 days more rain.

So: January is effectively as good as it gets here — 5 points behind February, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Christchurch

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