Paradise weather in September

In September, Paradise sees average daytime highs of 84°F and overnight lows near 57°F, with 0.5 in of rain across 1.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 87°F in the first days to 80°F by the end. The sky is clear or mostly clear about 83% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Paradise's 3rd-clearest and 10th-windiest month. For the whole year in context, see Paradise's year-round climate.

Daytime high
84°
3rd warmest
Overnight low
57°
9th coldest
Rainfall
0.5 in
1.6 wet days
Daylight
12 h 18 min
5:53 AM – 6:09 PM
Cloud cover
17%
3rd clearest
Wind
5 mph
10th windiest
Solar energy
5.93 kWh/m²
Travel score
7.4
out of 10

Paradise is town in Butte County, California, United States.

Density
558/km²
people per km²
Founded
1979

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 87°F in the first days to 80°F by the end.

A typical September day in Paradise reaches about 84°F in the afternoon and slips back to 57°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 93°F. Set against its neighbours, September runs about 6°F cooler than August and about 11°F warmer than October.

40°60°80°100°151015202530
Avg high (°F)Avg low (°F)
18860
28760
38759
48759
58759
68659
78658
88658
98558
108558
118558
128557
138457
148457
158457
168356
178356
188356
198356
208356
218256
228255
238255
248255
258155
268155
278154
288054
298054
307953

How September really feels in Paradise

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
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.

Paradise weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan53° / 37°9.61269.52.8
Feb55° / 38°9.211.3610.43.4
Mar59° / 40°8.112.44.811.74.5
Apr65° / 44°4.19.22.5136.1
May74° / 51°2.86.90.314.27.6
Jun83° / 58°0.92.9014.87.1
Jul90° / 62°0.00.3014.55.2
Aug89° / 61°0.10.7013.65.5
Sep84° / 57°0.51.6012.37.4
Oct73° / 49°2.74.30.110.98.1
Nov59° / 41°5.68.82.19.84.9
Dec51° / 36°10.712.35.49.22.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 83% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 9%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2946
3946
4955
5946
6946
7946
8937
9937
10937
11928
12928
13919
14919
15919
16919
17919
18919
19919
209010
219010
229010
239010
249010
259010
269010
278812
288812
298812
308713

Chance of precipitation in September

Any precipitation

Paradise gets around 0.5 in of rain over 1.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 9% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
34
44
54
64
74
84
94
105
115
125
135
145
156
166
176
186
196
207
217
227
237
248
258
268
278
289
299
309

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19811
29811
39811
49811
59811
69811
79721
89721
99721
109721
119811
129811
139811
149910
159910
169910
179910
189910
199910
209910
219910
229910
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:39 AM to 6:07 AM, and sunset from 6:34 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:396:34
212.95:406:32
312.85:416:30
412.85:426:29
512.75:436:27
612.75:436:25
712.75:446:24
812.65:456:22
912.65:466:20
1012.55:476:19
1112.55:486:17
1212.45:496:15
1312.45:506:14
1412.35:516:12
1512.35:526:10
1612.35:536:09
1712.25:546:07
1812.25:556:05
1912.15:566:03
2012.15:576:02
2112.05:586:00
2212.05:595:58
2311.96:005:57
2411.96:015:55
2511.96:025:53
2611.86:035:51
2711.86:045:50
2811.76:055:48
2911.76:065:46
3011.66:075:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.93 kWh/m².

For context, solar energy here swings from a low near 1.96 kWh/m² to a high of 8.25 kWh/m² in July across the year — September's 5.93 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.6Intense
46.6Intense
56.5Intense
66.5Intense
76.4Intense
86.3Intense
96.3Intense
106.2Intense
116.2Intense
126.1Intense
136.1Intense
146.0Intense
156.0Bright
165.9Bright
175.8Bright
185.8Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.4Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.1Bright
Planning a trip in September

Hazard calendar for Paradise

In seasonPeak

None of Paradise's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Paradise's rainy season runs November–March, when most of the year's rain falls.

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

Is September a good time to visit Paradise?

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

7.4
Sightseeing
3rd-best month of the year
8.8
Beach & pool
1st-best month of the year

September is one of the better times to visit Paradise for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Paradise in September

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

In September, Paradise sees daytime highs around 84°F and nights near 57°F. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Paradise in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Paradise peaks around July 10 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 10Dec 14UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr6High
May9Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Low
Dec2Low

Air quality in Paradise in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Paradise is worst in July — around 64 µg/m³ PM2.5 (unhealthy), about 8.2× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateUnhealthyModerateJul 2363 µg/m³Dec 238 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar13Moderate
Apr13Moderate
May10Good
Jun10Good
Jul64Unhealthy
Aug59Unhealthy
Sep63Unhealthy
Oct17Moderate
Nov37Poor
Dec8Good
Location & terrain

Where is Paradise?

Paradise sits at 39.8°N, 121.6°W, 1,778 ft above sea level, in United States. The nearest listed city is Chico, 12 mi away.

Topography around Paradise

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Paradise.

Within 2 miles, the terrain around Paradise has significant variations in elevation — a maximum elevation change of 1,535 ft around an average of 1,608 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,101 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,377 ft.

The land around Paradise is covered by trees (47%) and grassland (43%) within 2 miles, trees (57%) and grassland (39%) within 10 miles, and trees (58%) and grassland (27%) within 50 miles.

2 miles
1,535 ft
10 miles
4,101 ft
50 miles
9,377 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Chico 12 mi · Oroville 17 mi · Yuba City 43 mi · Linda 44 mi · South Yuba City 45 mi · Lincoln 63 mi · Susanville 68 mi · Rocklin 70 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Paradise (39.7596°, -121.6219°, elevation 1,778 ft), 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).