Ilomantsi Naarva Weather Records (FIE00145007)

Record envelope, standing records and threshold days for Ilomantsi Naarva (FIE00145007), Finland, with 53 years of record.

Key Facts for Ilomantsi Naarva

Ilomantsi Naarva (FIE00145007) is a weather station in Finland at 63.03 latitude and 31.06 longitude, 231 m (758 ft) above sea level.
The station reports from 1970 to 2022, 53 years of record.
1,464 records set at Ilomantsi Naarva still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Ilomantsi Naarva set a daily record precipitation of 12.0 mm (0.5 in) on 25 March 2022.

About the Station

Location: Finland, 63.03 latitude, 31.06 longitude.
Elevation: 231 m (758 ft).
Period of record: 1970 to 2022, 53 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Ilomantsi Naarva. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ilomantsi Naarva, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	3.2 C (37.8 F)	-35.0 C (-31.0 F)	n/a	n/a
Feb	6.0 C (42.8 F)	-29.6 C (-21.3 F)	n/a	n/a
Mar	10.0 C (50.0 F)	-21.5 C (-6.7 F)	n/a	n/a
Apr	23.6 C (74.5 F)	-21.0 C (-5.8 F)	n/a	n/a
May	25.8 C (78.4 F)	-8.5 C (16.7 F)	n/a	n/a
Jun	30.0 C (86.0 F)	-0.8 C (30.6 F)	n/a	n/a
Jul	30.8 C (87.4 F)	3.5 C (38.3 F)	n/a	n/a
Aug	28.2 C (82.8 F)	2.4 C (36.3 F)	n/a	n/a
Sep	24.0 C (75.2 F)	-4.1 C (24.6 F)	n/a	n/a
Oct	15.5 C (59.9 F)	-15.0 C (5.0 F)	n/a	n/a
Nov	7.7 C (45.9 F)	-23.2 C (-9.8 F)	n/a	n/a
Dec	4.6 C (40.3 F)	-32.8 C (-27.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ilomantsi Naarva still stand. 1999 holds the most, with 130.

All-Time Record Progression

2 new records

2 all-time records were set at Ilomantsi Naarva between 5 August 2004 and 18 August 2008. Each dot is a new record.

When Ilomantsi Naarva set new all-time records
Date	Kind	Detail
2004-08-05	Record daily precipitation	Record daily precipitation 71.1 mm (2.8 in)
2008-08-18	Record daily precipitation	Record daily precipitation 71.8 mm (2.8 in)

Wettest Day of Each Month

Aug: 71.8 mm (2.8 in)

The wettest day on record for each calendar month at Ilomantsi Naarva. The most was 71.8 mm (2.8 in) on 18 August 2008.

Record daily precipitation for each month at Ilomantsi Naarva
Month	Record daily precipitation (mm)	Date
Jan	18.6 mm (0.7 in)	30 January 2005
Feb	17.8 mm (0.7 in)	19 February 2017
Mar	16.5 mm (0.6 in)	13 March 2018
Apr	18.9 mm (0.7 in)	27 April 1970
May	35.4 mm (1.4 in)	13 May 2014
Jun	50.8 mm (2.0 in)	17 June 2009
Jul	54.4 mm (2.1 in)	29 July 2021
Aug	71.8 mm (2.8 in)	18 August 2008
Sep	41.5 mm (1.6 in)	16 September 1994
Oct	35.9 mm (1.4 in)	27 October 2006
Nov	21.6 mm (0.9 in)	15 November 1991
Dec	23.2 mm (0.9 in)	12 December 1996

Period of Record Coverage

1989 to 2004

16 years of record at Ilomantsi Naarva, 1989 to 2004. 2 years have data for under 90 percent of days and are left out of rankings: 1989, 2004.

Days with data per year at Ilomantsi Naarva
Year	Days with data	Share of year	Complete
1989	61	17%	No
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	182	50%	No

Latest Records

Latest records at Ilomantsi Naarva
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 March 2022	Ilomantsi Naarva, FI	daily rain	12.0 mm (0.5 in)	4.9 mm (0.19 in)	13 years	20 of 100 (Routine)
25 February 2022	Ilomantsi Naarva, FI	daily rain	16.8 mm (0.7 in)	11.0 mm (0.4 in)	20 years	20 of 100 (Routine)
18 February 2022	Ilomantsi Naarva, FI	daily rain	5.3 mm (0.21 in)	1.2 mm (0.05 in)	22 years	16 of 100 (Routine)
13 February 2022	Ilomantsi Naarva, FI	daily rain	9.3 mm (0.37 in)	4.0 mm (0.16 in)	18 years	20 of 100 (Routine)
12 February 2022	Ilomantsi Naarva, FI	daily rain	4.3 mm (0.17 in)	0.2 mm (0.01 in)	30 years	14 of 100 (Routine)
12 January 2022	Ilomantsi Naarva, FI	daily rain	8.3 mm (0.33 in)	1.3 mm (0.05 in)	10 years	13 of 100 (Routine)
5 January 2022	Ilomantsi Naarva, FI	daily rain	8.0 mm (0.31 in)	3.2 mm (0.13 in)	12 years	20 of 100 (Routine)
14 December 2021	Ilomantsi Naarva, FI	daily rain	11.5 mm (0.5 in)	1.4 mm (0.06 in)	15 years	13 of 100 (Routine)
25 November 2021	Ilomantsi Naarva, FI	daily rain	8.3 mm (0.33 in)	2.0 mm (0.08 in)	35 years	20 of 100 (Routine)
25 October 2021	Ilomantsi Naarva, FI	daily rain	10.8 mm (0.4 in)	2.2 mm (0.09 in)	4 years	11 of 100 (Routine)
3 August 2021	Ilomantsi Naarva, FI	daily rain	45.5 mm (1.8 in)	14.9 mm (0.6 in)	18 years	29 of 100 (Routine)
29 July 2021	Ilomantsi Naarva, FI	monthly rain	54.4 mm (2.1 in)	12.7 mm (0.5 in)	31 years	43 of 100 (Notable)
8 May 2021	Ilomantsi Naarva, FI	daily rain	24.4 mm (1.0 in)	14.4 mm (0.6 in)	36 years	20 of 100 (Routine)
6 May 2021	Ilomantsi Naarva, FI	daily rain	23.1 mm (0.9 in)	6.0 mm (0.24 in)	8 years	20 of 100 (Routine)
20 March 2021	Ilomantsi Naarva, FI	daily rain	6.4 mm (0.25 in)	0.6 mm (0.02 in)	11 years	10 of 100 (Routine)
24 February 2021	Ilomantsi Naarva, FI	daily rain	7.9 mm (0.31 in)	2.6 mm (0.10 in)	6 years	17 of 100 (Routine)
22 January 2021	Ilomantsi Naarva, FI	daily rain	10.5 mm (0.4 in)	3.2 mm (0.13 in)	19 years	20 of 100 (Routine)
31 December 2020	Ilomantsi Naarva, FI	daily rain	11.2 mm (0.4 in)	2.3 mm (0.09 in)	2 years	12 of 100 (Routine)
21 November 2020	Ilomantsi Naarva, FI	daily rain	15.8 mm (0.6 in)	6.4 mm (0.25 in)	40 years	20 of 100 (Routine)
18 November 2020	Ilomantsi Naarva, FI	daily rain	20.1 mm (0.8 in)	10.7 mm (0.4 in)	10 years	20 of 100 (Routine)

Climate Trend

14 complete years, 1990 to 2003

One stripe for each of 14 complete years at Ilomantsi Naarva, 1990 to 2003. Blue stripes are years cooler than the station's own mean of 2.1 C (35.9 F); red stripes are warmer. The coolest year was 1998, at 1.2 C (34.2 F), and the warmest was 2000, at 3.6 C (38.4 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Ilomantsi Naarva as warming stripes, 1990 to 2003
Year	Annual mean temperature	Difference from the station mean
1990	2.5 C	+0.33 C
1991	2.2 C	+0.08 C
1992	2.3 C	+0.12 C
1993	1.3 C	-0.87 C
1994	1.8 C	-0.31 C
1995	2.5 C	+0.34 C
1996	1.9 C	-0.28 C
1997	1.6 C	-0.51 C
1998	1.2 C	-0.93 C
1999	2.4 C	+0.29 C
2000	3.6 C	+1.42 C
2001	2.1 C	-0.10 C
2002	2.3 C	+0.11 C
2003	2.4 C	+0.29 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1970 to 2022

Yearly extremes at Ilomantsi Naarva: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	30.8 C (87.4 F)	1999	28.1 C (82.6 F)	16
Coldest night (TNn)	-35.0 C (-31.0 F)	2003	-27.1 C (-16.8 F)	16
Wettest day (Rx1day)	71.8 mm (2.8 in)	2008	31.3 mm (1.2 in)	53
Wettest five days (Rx5day)	94.7 mm (3.7 in)	2012	55.6 mm (2.2 in)	53
Longest dry spell (CDD)	50 days	1978	17 days	53

Hottest day (TXx)

The hottest day of the year at Ilomantsi Naarva, 1970 to 2022. The record is 30.8 C (87.4 F) in 1999, marked on the chart; the median year is 28.1 C (82.6 F).

Hottest day (TXx) at Ilomantsi Naarva by year
Year	Hottest day (TXx)
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	7.5 C (45.5 F)
1990	25.3 C (77.5 F)
1991	27.6 C (81.7 F)
1992	26.0 C (78.8 F)
1993	25.5 C (77.9 F)
1994	28.2 C (82.8 F)
1995	28.0 C (82.4 F)
1996	24.4 C (75.9 F)
1997	28.8 C (83.8 F)
1998	29.0 C (84.2 F)
1999	30.8 C (87.4 F)
2000	28.5 C (83.3 F)
2001	29.6 C (85.3 F)
2002	29.5 C (85.1 F)
2003	29.5 C (85.1 F)
2004	25.0 C (77.0 F)
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a

Coldest night (TNn)

The coldest night of the year at Ilomantsi Naarva, 1970 to 2022. The record is -35.0 C (-31.0 F) in 2003, marked on the chart; the median year is -27.1 C (-16.8 F).

Coldest night (TNn) at Ilomantsi Naarva by year
Year	Coldest night (TNn)
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	-24.6 C (-12.3 F)
1990	-28.0 C (-18.4 F)
1991	-27.2 C (-17.0 F)
1992	-23.2 C (-9.8 F)
1993	-24.5 C (-12.1 F)
1994	-26.7 C (-16.1 F)
1995	-29.0 C (-20.2 F)
1996	-27.0 C (-16.6 F)
1997	-24.2 C (-11.6 F)
1998	-29.4 C (-20.9 F)
1999	-32.0 C (-25.6 F)
2000	-23.0 C (-9.4 F)
2001	-28.0 C (-18.4 F)
2002	-32.8 C (-27.0 F)
2003	-35.0 C (-31.0 F)
2004	-24.0 C (-11.2 F)
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a

Wettest day (Rx1day)

The wettest day of the year at Ilomantsi Naarva, 1970 to 2022. The record is 71.8 mm (2.8 in) in 2008, marked on the chart; the median year is 31.3 mm (1.2 in).

Wettest day (Rx1day) at Ilomantsi Naarva by year
Year	Wettest day (Rx1day)
1970	29.7 mm (1.2 in)
1971	28.5 mm (1.1 in)
1972	16.8 mm (0.7 in)
1973	17.8 mm (0.7 in)
1974	27.5 mm (1.1 in)
1975	32.6 mm (1.3 in)
1976	37.4 mm (1.5 in)
1977	41.2 mm (1.6 in)
1978	31.3 mm (1.2 in)
1979	17.2 mm (0.7 in)
1980	35.8 mm (1.4 in)
1981	33.5 mm (1.3 in)
1982	24.6 mm (1.0 in)
1983	27.5 mm (1.1 in)
1984	22.0 mm (0.9 in)
1985	20.8 mm (0.8 in)
1986	32.5 mm (1.3 in)
1987	21.7 mm (0.9 in)
1988	38.9 mm (1.5 in)
1989	19.0 mm (0.7 in)
1990	41.7 mm (1.6 in)
1991	36.0 mm (1.4 in)
1992	34.4 mm (1.4 in)
1993	40.5 mm (1.6 in)
1994	41.5 mm (1.6 in)
1995	43.2 mm (1.7 in)
1996	45.2 mm (1.8 in)
1997	26.0 mm (1.0 in)
1998	24.8 mm (1.0 in)
1999	30.6 mm (1.2 in)
2000	22.8 mm (0.9 in)
2001	31.4 mm (1.2 in)
2002	30.2 mm (1.2 in)
2003	30.7 mm (1.2 in)
2004	71.1 mm (2.8 in)
2005	19.6 mm (0.8 in)
2006	35.9 mm (1.4 in)
2007	27.3 mm (1.1 in)
2008	71.8 mm (2.8 in)
2009	50.8 mm (2.0 in)
2010	30.6 mm (1.2 in)
2011	32.4 mm (1.3 in)
2012	26.3 mm (1.0 in)
2013	41.7 mm (1.6 in)
2014	35.4 mm (1.4 in)
2015	32.4 mm (1.3 in)
2016	20.6 mm (0.8 in)
2017	35.2 mm (1.4 in)
2018	56.7 mm (2.2 in)
2019	26.7 mm (1.1 in)
2020	27.9 mm (1.1 in)
2021	54.4 mm (2.1 in)
2022	16.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ilomantsi Naarva, 1970 to 2022. The record is 94.7 mm (3.7 in) in 2012, marked on the chart; the median year is 55.6 mm (2.2 in).

Wettest five days (Rx5day) at Ilomantsi Naarva by year
Year	Wettest five days (Rx5day)
1970	48.1 mm (1.9 in)
1971	62.3 mm (2.5 in)
1972	37.1 mm (1.5 in)
1973	42.6 mm (1.7 in)
1974	47.6 mm (1.9 in)
1975	76.5 mm (3.0 in)
1976	52.2 mm (2.1 in)
1977	57.2 mm (2.3 in)
1978	48.3 mm (1.9 in)
1979	55.6 mm (2.2 in)
1980	60.5 mm (2.4 in)
1981	50.2 mm (2.0 in)
1982	47.7 mm (1.9 in)
1983	40.9 mm (1.6 in)
1984	46.1 mm (1.8 in)
1985	35.1 mm (1.4 in)
1986	57.4 mm (2.3 in)
1987	44.2 mm (1.7 in)
1988	64.2 mm (2.5 in)
1989	52.4 mm (2.1 in)
1990	52.7 mm (2.1 in)
1991	52.2 mm (2.1 in)
1992	65.7 mm (2.6 in)
1993	69.5 mm (2.7 in)
1994	74.6 mm (2.9 in)
1995	72.9 mm (2.9 in)
1996	74.9 mm (2.9 in)
1997	60.3 mm (2.4 in)
1998	47.0 mm (1.9 in)
1999	44.1 mm (1.7 in)
2000	64.5 mm (2.5 in)
2001	67.1 mm (2.6 in)
2002	38.4 mm (1.5 in)
2003	82.1 mm (3.2 in)
2004	82.8 mm (3.3 in)
2005	35.9 mm (1.4 in)
2006	74.5 mm (2.9 in)
2007	55.2 mm (2.2 in)
2008	83.2 mm (3.3 in)
2009	75.9 mm (3.0 in)
2010	57.4 mm (2.3 in)
2011	58.7 mm (2.3 in)
2012	94.7 mm (3.7 in)
2013	71.5 mm (2.8 in)
2014	64.0 mm (2.5 in)
2015	40.4 mm (1.6 in)
2016	46.7 mm (1.8 in)
2017	51.9 mm (2.0 in)
2018	84.9 mm (3.3 in)
2019	54.0 mm (2.1 in)
2020	55.6 mm (2.2 in)
2021	73.0 mm (2.9 in)
2022	37.5 mm (1.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ilomantsi Naarva, 1970 to 2022. The record is 50 days in 1978, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Ilomantsi Naarva by year
Year	Longest dry spell (CDD)
1970	33 days
1971	13 days
1972	36 days
1973	13 days
1974	18 days
1975	15 days
1976	37 days
1977	12 days
1978	50 days
1979	14 days
1980	24 days
1981	21 days
1982	17 days
1983	16 days
1984	14 days
1985	11 days
1986	17 days
1987	19 days
1988	12 days
1989	13 days
1990	37 days
1991	13 days
1992	25 days
1993	17 days
1994	13 days
1995	13 days
1996	26 days
1997	13 days
1998	26 days
1999	16 days
2000	19 days
2001	22 days
2002	18 days
2003	13 days
2004	21 days
2005	17 days
2006	28 days
2007	13 days
2008	19 days
2009	12 days
2010	21 days
2011	15 days
2012	13 days
2013	19 days
2014	21 days
2015	13 days
2016	24 days
2017	14 days
2018	30 days
2019	21 days
2020	13 days
2021	17 days
2022	19 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

50 years, 1970 to 2021

A day with at least 31.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 74.4 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Ilomantsi Naarva: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	31.5 mm (1.2 in)
5 years	41.5 mm (1.6 in)
10 years	48.7 mm (1.9 in)
25 years	58.5 mm (2.3 in)
50 years	66.2 mm (2.6 in)
100 years	74.4 mm (2.9 in)	Longer than the 50 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 50 years of values from 1970 to 2021.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 71.8 mm (2.8 in) in 2008; 71.1 mm (2.8 in) in 2004; 56.7 mm (2.2 in) in 2018.

Download the Data

Data for Ilomantsi Naarva standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ilomantsi Naarva threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).