Weather in Christchurch in March

Prime time. If you get to pick your dates, March is the one. Highs average 21.7 °C, lows 10.4 °C, and rain falls on 11 days — nothing in the month is working against you.

March ranks 2 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 11 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

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average March reaches 30 °C. Across the twenty years measured, the hottest March day reached 33 °C and the coldest night fell to 4.8 °C, and the wettest single day dropped 26 mm — roughly 43% of the month's rain in one day.

March is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest March on record still delivered 101 mm against 22 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 61 mm average is a reasonable planning figure, not a promise.

Wind is light at 10 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How March sits in the year

The month is on the way down: 2.3 °C cooler than February, with April dropping another 3.7 °C. The first week and the last are not the same trip.

Daylight in March

12.5 hours of daylight, losing 1.5 hours across the month. That is between Christchurch's extremes of 15.4 and 9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 15 °C in March — 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.

March 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 — 3.3 °C cooler, 3 days less rain. Greymouth is the weaker option in March — 3.2 °C cooler, 3 days more rain.

So: March is effectively as good as it gets here — 3 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 March.