Ashburton weather in September

In September, Ashburton sees average daytime highs of 14°C and overnight lows near 6°C, with 49 mm of rain across 8.7 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 14°C by the end. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of September to 12 h 24 min by month's end. Set against the rest of the year, September is Ashburton's 5th-clearest and 6th-windiest month. For the whole year in context, see Ashburton's year-round climate.

Daytime high: 14°; 8th warmest
Overnight low: 6°; 4th coldest
Rainfall: 49 mm; 8.7 wet days
Daylight: 11 h 42 min; 7:36 AM – 7:18 PM
Cloud cover: 57%; 5th clearest
Wind: 13 km/h; 6th windiest
Solar energy: 3.8 kWh/m²
Travel score: 4.1; out of 10

Ashburton is town in New Zealand's South Island.

Air quality: Good; PM10 21.2 µg/m³ · 2012
Density: 569/km²; people per km²

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

← August Ashburton year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 14°C by the end.

A typical September day in Ashburton reaches about 14°C in the afternoon and slips back to 6°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 18°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	13	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Avg low (°C)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6

	Avg high (°C)	Avg low (°C)
1	13	5
2	13	5
3	13	5
4	13	5
5	13	5
6	13	5
7	13	5
8	13	5
9	13	5
10	13	5
11	13	5
12	13	5
13	14	5
14	14	5
15	14	6
16	14	6
17	14	6
18	14	6
19	14	6
20	14	6
21	14	6
22	14	6
23	14	6
24	14	6
25	14	6
26	14	6
27	14	6
28	14	6
29	14	6
30	14	6

How September really feels in Ashburton

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ashburton weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	20° / 13°	58	9.2	14.9	6.4
Feb	20° / 12°	51	7.3	13.8	6.6
Mar	19° / 11°	51	7.4	12.4	6.4
Apr	16° / 9°	59	9.4	10.8	5.2
May	14° / 6°	52	8.2	9.5	4.1
Jun	11° / 3°	58	8.7	8.8	2.7
Jul	10° / 3°	57	8.2	9.1	2.5
Aug	12° / 4°	58	9.4	10.2	3.1
Sep	14° / 6°	49	8.7	11.7	4.1
Oct	15° / 7°	58	10.7	13.2	4.6
Nov	17° / 9°	66	10.8	14.5	5.2
Dec	19° / 11°	66	11	15.2	5.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 49%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	50	49	49	49	48	49	49	50	50	49	51	51	52	52	51	52	53	53	53	53	52	52	52	52	51	51	50	49	49	48
Cloudier (%)	50	51	51	51	52	51	51	50	50	51	49	49	48	48	49	48	47	47	47	47	48	48	48	48	49	49	50	51	51	52

	Clearer (%)	Cloudier (%)
1	50	50
2	49	51
3	49	51
4	49	51
5	48	52
6	49	51
7	49	51
8	50	50
9	50	50
10	49	51
11	51	49
12	51	49
13	52	48
14	52	48
15	51	49
16	52	48
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	52	48
23	52	48
24	52	48
25	51	49
26	51	49
27	50	50
28	49	51
29	49	51
30	48	52

Chance of precipitation in September

Any precipitation

Ashburton gets around 49 mm of rain over 8.7 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 32% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	28	28	28	28	27	27	27	27	26	26	26	26	26	26	26	27	27	28	29	29	30	30	30	31	31	31	31	31	32	32

	Rain chance (%)
1	28
2	28
3	28
4	28
5	27
6	27
7	27
8	27
9	26
10	26
11	26
12	26
13	26
14	26
15	26
16	27
17	27
18	28
19	29
20	29
21	30
22	30
23	30
24	31
25	31
26	31
27	31
28	31
29	32
30	32

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	light breeze
2	12	light breeze
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	13	light breeze
8	13	light breeze
9	13	light breeze
10	13	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 10 h 54 min at the start of September to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over September. Sunrise moves from 8:05 AM to 7:10 AM, and sunset from 7:01 PM to 7:35 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	10.9	11.0	11.0	11.1	11.1	11.2	11.2	11.3	11.3	11.4	11.4	11.5	11.5	11.6	11.7	11.7	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.3	12.3	12.4	12.4
Sunrise (AM)	8:05	8:03	8:01	7:59	7:57	7:55	7:53	7:52	7:50	7:48	7:46	7:44	7:42	7:40	7:38	7:36	7:34	7:32	7:31	7:29	7:27	7:25	7:23	7:21	7:19	7:17	7:15	7:13	7:11	7:10
Sunset (PM)	7:01	7:02	7:03	7:04	7:06	7:07	7:08	7:09	7:10	7:11	7:13	7:14	7:15	7:16	7:17	7:18	7:20	7:21	7:22	7:23	7:24	7:26	7:27	7:28	7:29	7:30	7:32	7:33	7:34	7:35

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.9	8:05	7:01
2	11.0	8:03	7:02
3	11.0	8:01	7:03
4	11.1	7:59	7:04
5	11.1	7:57	7:06
6	11.2	7:55	7:07
7	11.2	7:53	7:08
8	11.3	7:52	7:09
9	11.3	7:50	7:10
10	11.4	7:48	7:11
11	11.4	7:46	7:13
12	11.5	7:44	7:14
13	11.5	7:42	7:15
14	11.6	7:40	7:16
15	11.7	7:38	7:17
16	11.7	7:36	7:18
17	11.8	7:34	7:20
18	11.8	7:32	7:21
19	11.9	7:31	7:22
20	11.9	7:29	7:23
21	12.0	7:27	7:24
22	12.0	7:25	7:26
23	12.1	7:23	7:27
24	12.1	7:21	7:28
25	12.2	7:19	7:29
26	12.2	7:17	7:30
27	12.3	7:15	7:32
28	12.3	7:13	7:33
29	12.4	7:11	7:34
30	12.4	7:10	7:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.8 kWh/m².

For context, solar energy here swings from a low near 1.43 kWh/m² to a high of 6.6 kWh/m² in January across the year — September's 3.8 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.1	3.2	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.1	Moderate
2	3.2	Moderate
3	3.2	Moderate
4	3.3	Moderate
5	3.3	Moderate
6	3.4	Moderate
7	3.4	Moderate
8	3.5	Moderate
9	3.5	Moderate
10	3.6	Moderate
11	3.6	Moderate
12	3.7	Moderate
13	3.7	Moderate
14	3.8	Moderate
15	3.8	Moderate
16	3.9	Moderate
17	3.9	Moderate
18	4.0	Moderate
19	4.0	Bright
20	4.0	Bright
21	4.1	Bright
22	4.1	Bright
23	4.2	Bright
24	4.2	Bright
25	4.2	Bright
26	4.3	Bright
27	4.3	Bright
28	4.3	Bright
29	4.4	Bright
30	4.4	Bright

Planning a trip in September

Is September a good time to visit Ashburton?

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

4.1

Sightseeing

8th-best month of the year

0.0

Beach & pool

9th-best month of the year

September is a reasonable time to visit Ashburton for sightseeing.

What to pack for Ashburton in September

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

In September, Ashburton sees daytime highs around 14°C and nights near 6°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Ashburton in September

The nearest coast averages about 10°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in February at about 17°C and coldest in August near 9°C.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	17	17	16	14	12	10	9	9	10	11	14	15
Comfort	Cool	Cool	Cool	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool

	Sea temperature (°C)	Comfort
Jan	17	Cool
Feb	17	Cool
Mar	16	Cool
Apr	14	Bracing
May	12	Bracing
Jun	10	Bracing
Jul	9	Bracing
Aug	9	Bracing
Sep	10	Bracing
Oct	11	Bracing
Nov	14	Bracing
Dec	15	Cool

UV index in Ashburton in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ashburton peaks around January 16 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 1 (low).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	10	6	3	2	1	2	2	3	6	8	10
Level	Extreme	Very high	High	Moderate	Low	Low	Low	Moderate	Moderate	High	Very high	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	10	Very high
Mar	6	High
Apr	3	Moderate
May	2	Low
Jun	1	Low
Jul	2	Low
Aug	2	Moderate
Sep	3	Moderate
Oct	6	High
Nov	8	Very high
Dec	10	Very high

Location & terrain

Where is Ashburton?

Ashburton sits at 43.9°S, 171.7°E, 106 m above sea level, in New Zealand. The nearest listed city is Rolleston, 63 km away.

Topography around Ashburton

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

Within 3 km, the terrain around Ashburton has only modest variations in elevation — a maximum elevation change of 42 m around an average of 103 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 195 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,287 m.

The land around Ashburton is covered by grassland (40%) and artificial surfaces (25%) within 3 km, grassland (50%) and cropland (42%) within 16 km, and grassland (46%) and water (27%) within 80 km.

3 km

42 m

grassland 40%

16 km

195 m

grassland 50%

80 km

2,287 m

grassland 46%

treesgrasslandcroplandartificial surfacesbare terrainwater

← August Ashburton year-round climate October →Best places to visit in September

September weather nearby: Rolleston 63 km · Timaru 67 km · Christchurch 83 km · Rangiora 95 km · Tekapo 101 km · Franz Josef 137 km · Wanaka 224 km · Kaikoura 229 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

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 Ashburton (-43.8983°, 171.7301°, elevation 106 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).

	Avg high (°C)	Avg low (°C)
1	13	5
2	13	5
3	13	5
4	13	5
5	13	5
6	13	5
7	13	5
8	13	5
9	13	5
10	13	5
11	13	5
12	13	5
13	14	5
14	14	5
15	14	6
16	14	6
17	14	6
18	14	6
19	14	6
20	14	6
21	14	6
22	14	6
23	14	6
24	14	6
25	14	6
26	14	6
27	14	6
28	14	6
29	14	6
30	14	6

	Clearer (%)	Cloudier (%)
1	50	50
2	49	51
3	49	51
4	49	51
5	48	52
6	49	51
7	49	51
8	50	50
9	50	50
10	49	51
11	51	49
12	51	49
13	52	48
14	52	48
15	51	49
16	52	48
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	52	48
23	52	48
24	52	48
25	51	49
26	51	49
27	50	50
28	49	51
29	49	51
30	48	52

	Rain chance (%)
1	28
2	28
3	28
4	28
5	27
6	27
7	27
8	27
9	26
10	26
11	26
12	26
13	26
14	26
15	26
16	27
17	27
18	28
19	29
20	29
21	30
22	30
23	30
24	31
25	31
26	31
27	31
28	31
29	32
30	32

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	13	5
2	13	5
3	13	5
4	13	5
5	13	5
6	13	5
7	13	5
8	13	5
9	13	5
10	13	5
11	13	5
12	13	5
13	14	5
14	14	5
15	14	6
16	14	6
17	14	6
18	14	6
19	14	6
20	14	6
21	14	6
22	14	6
23	14	6
24	14	6
25	14	6
26	14	6
27	14	6
28	14	6
29	14	6
30	14	6

	Clearer (%)	Cloudier (%)
1	50	50
2	49	51
3	49	51
4	49	51
5	48	52
6	49	51
7	49	51
8	50	50
9	50	50
10	49	51
11	51	49
12	51	49
13	52	48
14	52	48
15	51	49
16	52	48
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	52	48
23	52	48
24	52	48
25	51	49
26	51	49
27	50	50
28	49	51
29	49	51
30	48	52

	Rain chance (%)
1	28
2	28
3	28
4	28
5	27
6	27
7	27
8	27
9	26
10	26
11	26
12	26
13	26
14	26
15	26
16	27
17	27
18	28
19	29
20	29
21	30
22	30
23	30
24	31
25	31
26	31
27	31
28	31
29	32
30	32

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	13	5
2	13	5
3	13	5
4	13	5
5	13	5
6	13	5
7	13	5
8	13	5
9	13	5
10	13	5
11	13	5
12	13	5
13	14	5
14	14	5
15	14	6
16	14	6
17	14	6
18	14	6
19	14	6
20	14	6
21	14	6
22	14	6
23	14	6
24	14	6
25	14	6
26	14	6
27	14	6
28	14	6
29	14	6
30	14	6

	Clearer (%)	Cloudier (%)
1	50	50
2	49	51
3	49	51
4	49	51
5	48	52
6	49	51
7	49	51
8	50	50
9	50	50
10	49	51
11	51	49
12	51	49
13	52	48
14	52	48
15	51	49
16	52	48
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	52	48
23	52	48
24	52	48
25	51	49
26	51	49
27	50	50
28	49	51
29	49	51
30	48	52

	Rain chance (%)
1	28
2	28
3	28
4	28
5	27
6	27
7	27
8	27
9	26
10	26
11	26
12	26
13	26
14	26
15	26
16	27
17	27
18	28
19	29
20	29
21	30
22	30
23	30
24	31
25	31
26	31
27	31
28	31
29	32
30	32

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100