Batavia weather in September

In September, Batavia sees average daytime highs of 71°F and overnight lows near 53°F, with 3.3 in of rain across 10.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 75°F in the first days to 66°F by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Batavia's 3rd-clearest and 9th-windiest month. For the whole year in context, see Batavia's year-round climate.

Daytime high
71°
4th warmest
Overnight low
53°
9th coldest
Rainfall
3.3 in
10.1 wet days
Daylight
12 h 18 min
5:58 AM – 6:16 PM
Cloud cover
58%
3rd clearest
Wind
7 mph
9th windiest
Solar energy
4.1 kWh/m²
Travel score
6.5
out of 10

Batavia is city in New York, USA.

Density
1,098/km²
people per km²
Founded
1802

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 75°F in the first days to 66°F by the end.

A typical September day in Batavia reaches about 71°F in the afternoon and slips back to 53°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 81°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17558
27558
37557
47557
57457
67457
77456
87356
97356
107355
117355
127255
137254
147254
157154
167153
177153
187053
197052
207052
216951
226951
236851
246850
256750
266750
276749
286649
296649
306548

How September really feels in Batavia

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.

Batavia weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 19°2.812.511.39.20.0
Feb33° / 19°2.410.48.710.20.0
Mar42° / 26°3.011.86.511.60.5
Apr55° / 38°3.812.62.513.13.3
May66° / 48°3.512.6014.45.7
Jun75° / 57°4.012.8015.16.4
Jul79° / 62°4.013.1014.86.3
Aug77° / 60°3.312013.86.6
Sep71° / 53°3.310.1012.36.5
Oct58° / 43°3.712.60.210.84.2
Nov46° / 33°3.011.83.99.51.3
Dec36° / 25°3.012.298.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25545
35446
45347
55446
65347
75248
85149
95149
105050
115050
124951
135050
145050
155050
164951
174951
184951
194951
204951
214951
224852
234753
244753
254753
264753
274555
284555
294456
304555

Chance of precipitation in September

Any precipitation

Batavia gets around 3.3 in of rain over 10.1 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 34% and peaks near 39% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
132
232
332
432
532
633
733
833
933
1034
1134
1234
1333
1433
1533
1633
1733
1833
1933
2033
2134
2234
2335
2436
2536
2637
2738
2839
2939
3039

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1352822141
2362821141
3372820131
4392720131
5402719121
6422718121
7432718111
8442718101
946271791
1047261791
1149261781
1250251771
1351251671
1453241661
1555241560
1657231550
1759221450
1860221440
1961211440
2063211330
2164201330
2267191220
2367191220
2469181120
2570181020
2672171010
277317910
287516810
297516810
307715710

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:42 AM to 6:14 AM, and sunset from 6:43 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:426:43
213.05:436:42
312.95:446:40
412.95:456:38
512.85:466:36
612.85:476:34
712.75:486:32
812.75:496:31
912.65:516:29
1012.65:526:27
1112.55:536:25
1212.55:546:23
1312.45:556:21
1412.45:566:19
1512.35:576:18
1612.35:586:16
1712.26:006:14
1812.26:016:12
1912.16:026:10
2012.16:036:08
2112.06:046:06
2212.06:056:04
2311.96:066:03
2411.96:086:01
2511.86:095:59
2611.86:105:57
2711.76:115:55
2811.76:125:53
2911.66:135:51
3011.66:145:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.1 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.23 kWh/m² in June across the year — September's 4.1 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Batavia?

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

6.5
Sightseeing
2nd-best month of the year
4.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Batavia for sightseeing.

What to pack for Batavia in September

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

In September, Batavia sees daytime highs around 71°F and nights near 53°F. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Batavia in September

The nearest coast averages about 67°F 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 26 mi away) is warmest in August at about 72°F and coldest in March near 37°F.

It's comfortable for a long swim from Jul 15 to Sep 11 — about 1.9 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar37Bracing
Apr38Bracing
May43Bracing
Jun56Bracing
Jul69Refreshing
Aug72Refreshing
Sep67Cool
Oct57Bracing
Nov48Bracing
Dec42Bracing

UV index in Batavia 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 Batavia peaks around July 10 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 10UV 8Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Batavia?

Batavia sits at 43.0°N, 78.2°W, 892 ft above sea level, in United States. The nearest listed city is East Amherst, 25 mi away.

Topography around Batavia

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

Within 2 miles, the terrain around Batavia has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 902 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,089 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,067 ft.

The land around Batavia is covered by trees (46%) within 2 miles, trees (44%) and cropland (37%) within 10 miles, and trees (45%) and water (25%) within 50 miles.

2 miles
98 ft
10 miles
1,089 ft
50 miles
2,067 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: East Amherst 25 mi · Depew 26 mi · Gates-North Gates 27 mi · Lockport 28 mi · Henrietta 29 mi · Cheektowaga 29 mi · Rochester 31 mi · Amherst 31 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 Batavia (42.9981°, -78.1875°, elevation 892 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. 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).