Siilinjärvi weather in August

In August, Siilinjärvi sees average daytime highs of 19°C and overnight lows near 11°C, with 82 mm of rain across 12.8 wet days and about 15.9 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 15% of the time in August, and the air most often feels dry.

Daylight stretches from about 17 h 24 min at the start of August to 14 h 18 min by month's end. Set against the rest of the year, August is Siilinjärvi's 5th-clearest and 11th-windiest month. For the whole year in context, see Siilinjärvi's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
11°
11th coldest
Rainfall
82 mm
12.8 wet days
Daylight
15 h 54 min
4:17 AM – 8:10 PM
Cloud cover
71%
5th clearest
Wind
11 km/h
11th windiest
Solar energy
3.57 kWh/m²
Travel score
5.5
out of 10

Siilinjärvi is village in Siilinjärvi, Finland.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 17°C by the end.

A typical August day in Siilinjärvi reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 24°C. Set against its neighbours, August runs about 2°C cooler than July and about 6°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52113
62012
72012
82012
92012
102012
112012
122012
131912
141912
151911
161911
171911
181911
191811
201811
211811
221811
231810
241810
251710
261710
271710
281710
291710
301610
31169

How August really feels in Siilinjärvi

Once humidity and wind are folded in, August 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

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

Siilinjärvi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-6° / -11°4010.4125.40.0
Feb-5° / -11°348.59.88.10.0
Mar-0° / -7°339.19.411.20.0
Apr / -2°358.24.414.50.7
May13° / 53100.717.53.7
Jun18° / 10°7712.4019.65.4
Jul21° / 13°8913.6018.75.8
Aug19° / 11°8212.8015.95.5
Sep13° / 6511.60.112.73.3
Oct / 5911.92.79.40.6
Nov / -3°5511.886.40.0
Dec-3° / -7°5112.5124.40.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33466
43466
53466
63268
73268
83268
93169
103169
113169
123268
133268
143070
153169
163169
173070
183169
193169
203169
213169
222971
232971
242872
252872
262872
272773
282773
292674
302674
312674

Chance of precipitation in August

Any precipitation

Siilinjärvi gets around 82 mm of rain over 12.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
242
342
442
542
642
742
842
941
1041
1141
1241
1341
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2441
2540
2640
2740
2839
2939
3039
3139

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15036122
25335111
35335111
45534101
55534101
6573391
7583291
8593281
9613180
10633070
11633070
12652960
13672850
14672850
15692740
16702640
17722530
18722530
19742420
20752320
21762220
22772120
23782110
24792010
25801910
26811810
27821710
28831610
29841510
30851410
31861310

Wind in August

Winds average 11 km/h in August.

Across August, 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 17 h 24 min at the start of August to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 186 minutes over August. Sunrise moves from 3:34 AM to 5:00 AM, and sunset from 8:57 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
117.43:348:57
217.33:368:54
317.23:398:51
417.13:428:48
517.03:458:45
616.93:488:42
716.83:518:39
816.73:548:36
916.63:578:33
1016.54:008:29
1116.44:038:26
1216.34:058:23
1316.24:088:20
1416.14:118:16
1516.04:148:13
1615.94:178:10
1715.84:208:06
1815.74:238:03
1915.64:268:00
2015.54:297:56
2115.44:327:53
2215.34:357:50
2315.14:377:46
2415.04:407:43
2514.94:437:39
2614.84:467:36
2714.74:497:32
2814.64:527:29
2914.54:557:25
3014.44:577:22
3114.35:007:18

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.57 kWh/m².

For context, solar energy here swings from a low near 0.07 kWh/m² to a high of 5.25 kWh/m² in June across the year — August's 3.57 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.1Bright
74.1Bright
84.0Bright
94.0Moderate
103.9Moderate
113.8Moderate
123.8Moderate
133.7Moderate
143.7Moderate
153.6Moderate
163.6Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.0Moderate
273.0Moderate
282.9Moderate
292.9Moderate
302.8Moderate
312.7Moderate
Planning a trip in August

Is August a good time to visit Siilinjärvi?

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

5.5
Sightseeing
2nd-best month of the year
2.3
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Siilinjärvi for sightseeing.

What to pack for Siilinjärvi in August

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

In August, Siilinjärvi sees daytime highs around 19°C and nights near 11°C. Worth packing: rain gear. About 13 days see rain.

rain gear

UV index in Siilinjärvi in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Siilinjärvi peaks around July 14 at about 5 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 14UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb0Low
Mar1Low
Apr3Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug4Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Siilinjärvi?

Siilinjärvi sits at 63.1°N, 27.7°E, 83 m above sea level, in Finland. The nearest listed city is Kuopio, 21 km away.

VarkausPieksämäkiÄänekoskiLaukaaKontiolahtiJoensuu

Topography around Siilinjärvi

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

Within 3 km, the terrain around Siilinjärvi has only modest variations in elevation — a maximum elevation change of 97 m around an average of 104 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 283 m; within 80 km, significant variations in elevation — a maximum elevation change of 380 m.

The land around Siilinjärvi is covered by trees (61%) within 3 km, trees (58%) and water (21%) within 16 km, and trees (76%) within 80 km.

3 km
97 m
16 km
283 m
80 km
380 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Kuopio 21 km · Iisalmi 58 km · Varkaus 86 km · Pieksämäki 91 km · Äänekoski 112 km · Laukaa 115 km · Kontiolahti 116 km · Joensuu 119 km

Finland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$56,149
2025
Happiness
7.8 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 603
Religion
Lutheran 67%none 31%other 2%Greek Orthodox 1%

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 Siilinjärvi (63.0833°, 27.6667°, elevation 83 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. 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).