Nelson weather in January

In January, Nelson sees average daytime highs of 19°C and overnight lows near 14°C, with 102 mm of rain across 9.8 wet days and about 14.6 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 36% of the time in January, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of January to 14 h 12 min by month's end. Set against the rest of the year, January is Nelson's 5th-clearest and 4th-windiest month. For the whole year in context, see Nelson's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
102 mm
9.8 wet days
Daylight
14 h 42 min
6:16 AM – 8:56 PM
Cloud cover
54%
5th clearest
Wind
11 km/h
4th windiest
Solar energy
7.08 kWh/m²
Travel score
6.3
out of 10

Nelson is city on the South Island, New Zealand.

Density
122/km²
people per km²
Founded
1841

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical January day in Nelson reaches about 19°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°C. Set against its neighbours, January runs about 2°C warmer than December and on par with February.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11913
21913
31913
41914
51914
61914
71914
81914
91914
101914
111914
121914
131914
141914
151914
161914
171914
181914
191914
201914
211914
222014
232014
242014
252014
262014
272014
282014
292014
302014
312014

Nelson weather by month

How January compares with the rest of the year at a glance. January is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 14°1029.814.66.3
Feb20° / 14°808.113.76.5
Mar18° / 13°938.812.36.2
Apr16° / 11°10810.510.94.9
May13° / 12010.79.73.9
Jun11° / 12710.69.12.8
Jul10° / 1109.49.32.5
Aug11° / 11411.810.32.6
Sep12° / 11712.211.73.2
Oct14° / 1311313.13.9
Nov16° / 10°10911.614.34.7
Dec18° / 13°12512.814.95.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 19% of January, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75347
85347
95446
105446
115446
125446
135644
145644
155644
165644
175644
185644
195644
205644
215644
225743
235644
245644
255743
265644
275644
285644
295743
305743
315842

Chance of precipitation in January

Any precipitation

Nelson gets around 102 mm of rain over 9.8 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
435
535
635
735
834
934
1034
1134
1234
1333
1433
1533
1633
1733
1832
1932
2032
2131
2231
2330
2430
2530
2630
2730
2829
2929
3029
3128

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1643060
2633070
3633070
4633070
5623080
6623080
7623080
8613090
9613090
10613090
116030100
126030100
136030100
145930110
155930110
165731120
175731120
185631130
195631130
205332141
215232151
225132161
235132161
245032171
255032181
264931181
274931191
284931191
294931191
304930201
314930201

Wind in January

Winds average 11 km/h in January.

Across January, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 54 min at the start of January to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over January. Sunrise moves from 6:02 AM to 6:34 AM, and sunset from 8:58 PM to 8:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.96:028:58
214.96:038:58
314.96:048:58
414.96:058:58
514.96:058:58
614.96:068:58
714.96:078:58
814.86:088:58
914.86:098:58
1014.86:108:58
1114.86:118:58
1214.86:128:57
1314.76:138:57
1414.76:148:57
1514.76:158:57
1614.76:168:56
1714.66:178:56
1814.66:188:55
1914.66:198:55
2014.66:218:54
2114.56:228:54
2214.56:238:53
2314.56:248:53
2414.56:258:52
2514.46:268:51
2614.46:278:51
2714.46:298:50
2814.36:308:49
2914.36:318:49
3014.36:328:48
3114.26:348:47

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.08 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 7.08 kWh/m² in January across the year — January's 7.08 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.3Intense
47.3Intense
57.3Intense
67.2Intense
77.2Intense
87.1Intense
97.1Intense
107.0Intense
117.0Intense
127.0Intense
136.9Intense
146.9Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in January

Is January a good time to visit Nelson?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.3
Sightseeing
2nd-best month of the year
2.8
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Nelson for sightseeing.

What to pack for Nelson in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Nelson sees daytime highs around 19°C and nights near 14°C. Pack sun protection. Worth having: rain gear. About 10 days see rain.

sun protectionrain gear

Sea temperature near Nelson in January

The nearest coast averages about 19°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in February at about 20°C and coldest in August near 12°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb20Cool
Mar19Cool
Apr17Cool
May15Cool
Jun14Bracing
Jul12Bracing
Aug12Bracing
Sep12Bracing
Oct14Bracing
Nov16Cool
Dec17Cool

UV index in Nelson in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nelson peaks around January 1 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateLowModerateHighVery highExtremeJan 1UV 11Jun 17UV 1
UV index (midday)Level
Jan11Extreme
Feb10Extreme
Mar6High
Apr4Moderate
May2Low
Jun1Low
Jul2Low
Aug3Moderate
Sep4Moderate
Oct6High
Nov9Very high
Dec11Extreme
Location & terrain

Where is Nelson?

Nelson sits at 41.3°S, 173.3°E, 11 m above sea level, in New Zealand. The nearest listed city is Stoke, 7.0 km away.

KaroriWellingtonKaikouraPorirua

Topography around Nelson

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nelson.

Within 3 km, the terrain around Nelson has significant variations in elevation — a maximum elevation change of 403 m around an average of 62 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,211 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,095 m.

The land around Nelson is covered by trees (42%) and water (32%) within 3 km, trees (46%) and water (38%) within 16 km, and trees (48%), water (28%) and grassland (21%) within 80 km.

3 km
403 m
16 km
1,211 m
80 km
2,095 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Stoke 7.0 km · Richmond 11 km · Picton 61 km · Blenheim 62 km · Karori 122 km · Wellington 125 km · Kaikoura 132 km · Porirua 132 km

New Zealand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 86% of US
price level, 2025
GDP per capita
$49,591
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.5
per 100k, 2022
Road deaths
9.6
per 100k/yr, 2019
Income group
High
World Bank
Religion
no religion 49%Christian 37%objected to answering 7%Hindu 3%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nelson (-41.2708°, 173.284°, elevation 11 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).