Cēsis weather in September

In September, Cēsis sees average daytime highs of 16°C and overnight lows near 8°C, with 64 mm of rain across 11.9 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 13°C by the end. The sky is clear or mostly clear about 16% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Cēsis's 6th-clearest and 7th-windiest month. For the whole year in context, see Cēsis's year-round climate.

Daytime high
16°
5th warmest
Overnight low
9th coldest
Rainfall
64 mm
11.9 wet days
Daylight
12 h 30 min
5:59 AM – 6:28 PM
Cloud cover
69%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
2.58 kWh/m²
Travel score
4.5
out of 10

Cēsis is city and capital of Cēsis Municipality, Latvia.

Density
780/km²
people per km²
Founded
1206

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 18°C in the first days to 13°C by the end.

A typical September day in Cēsis reaches about 16°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 20°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11810
21810
31810
41810
51810
6179
7179
8179
9179
10179
11169
12168
13168
14168
15168
16168
17158
18158
19157
20157
21157
22147
23147
24147
25147
26147
27136
28136
29136
30136

How September really feels in Cēsis

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
0
heat index over the day's high
Days feeling ≤ C
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.

Cēsis weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -6°5411.910.17.10.0
Feb-2° / -7°45109.190.0
Mar / -4°4410.77.411.40.0
Apr10° / 4710.42.513.92.3
May16° / 6211.60.216.24.9
Jun19° / 10°9013017.55.6
Jul22° / 13°8513.80176.1
Aug21° / 12°8813.30155.9
Sep16° / 6411.9012.54.5
Oct / 73131.3101.6
Nov / -1°5712.14.97.70.0
Dec-0° / -4°5212.29.26.50.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33367
43367
53367
63466
73466
83466
93466
103466
113466
123466
133466
143466
153367
163367
173367
183466
193367
203367
213367
223367
233268
243268
253169
263169
273070
282872
292872
302773

Chance of precipitation in September

Any precipitation

Cēsis gets around 64 mm of rain over 11.9 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 40% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
343
442
542
642
742
842
941
1041
1141
1240
1340
1440
1539
1639
1738
1838
1938
2038
2138
2238
2338
2438
2538
2639
2739
2840
2940
3040

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 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
180191
281181
382171
483161
583161
684151
785141
886131
987121
1087121
1188111
1289101
139091
149181
159181
169271
179361
189460
199550
209550
219640
229640
239640
249730
259730
269730
279730
289730
299820
309820

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 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 42 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 144 minutes over September. Sunrise moves from 5:27 AM to 6:29 AM, and sunset from 7:10 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:277:10
213.65:297:08
313.65:317:05
413.55:337:02
513.45:356:59
613.35:376:56
713.25:406:54
813.15:426:51
913.15:446:48
1013.05:466:45
1112.95:486:42
1212.85:506:39
1312.75:526:36
1412.65:546:33
1512.65:576:31
1612.55:596:28
1712.46:016:25
1812.36:036:22
1912.26:056:19
2012.16:076:16
2112.16:096:13
2212.06:126:10
2311.96:146:07
2411.86:166:05
2511.76:186:02
2611.66:205:59
2711.66:225:56
2811.56:255:53
2911.46:275:50
3011.36:295:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.58 kWh/m².

For context, solar energy here swings from a low near 0.27 kWh/m² to a high of 5.51 kWh/m² in June across the year — September's 2.58 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.2Moderate
33.2Moderate
43.1Moderate
53.1Moderate
63.0Moderate
73.0Moderate
83.0Moderate
92.9Moderate
102.9Moderate
112.8Moderate
122.8Moderate
132.7Moderate
142.7Moderate
152.6Moderate
162.6Moderate
172.5Moderate
182.5Moderate
192.4Moderate
202.4Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.2Moderate
252.1Moderate
262.1Moderate
272.0Moderate
282.0Moderate
292.0Dim
301.9Dim
Planning a trip in September

Is September a good time to visit Cēsis?

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

4.5
Sightseeing
5th-best month of the year
0.7
Beach & pool
5th-best month of the year

September is a reasonable time to visit Cēsis for sightseeing.

What to pack for Cēsis in September

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

In September, Cēsis sees daytime highs around 16°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Cēsis in September

The nearest coast averages about 16°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 54 km away) is warmest in August at about 19°C and coldest in February near 1°C.

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

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May8Bracing
Jun14Bracing
Jul18Cool
Aug19Cool
Sep16Cool
Oct11Bracing
Nov8Bracing
Dec5Bracing

UV index in Cēsis 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 Cēsis peaks around June 20 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 20UV 6Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun6High
Jul5High
Aug5High
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Cēsis?

Cēsis sits at 57.3°N, 25.3°E, 102 m above sea level, in Latvia. The nearest listed city is Valmiera, 27 km away.

ValmieraSiguldaOgreValgaSalaspilsMadonaDārzciemsRiga

Topography around Cēsis

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

Within 3 km, the terrain around Cēsis has only modest variations in elevation — a maximum elevation change of 131 m around an average of 99 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 214 m; within 80 km, significant variations in elevation — a maximum elevation change of 317 m.

The land around Cēsis is covered by trees (49%) and grassland (26%) within 3 km, trees (64%) within 16 km, and trees (63%) within 80 km.

3 km
131 m
16 km
214 m
80 km
317 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Valmiera 27 km · Sigulda 31 km · Ogre 68 km · Valga 69 km · Salaspils 74 km · Madona 76 km · Dārzciems 78 km · Riga 81 km

Latvia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$26,312
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2.5
per 100k, 2023
Road deaths
8.1
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 599
Religion
Lutheran 36%unspecified/none 24%Roman Catholic 20%Orthodox 19%

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 Cēsis (57.3119°, 25.2746°, elevation 102 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).