January is one of the warmer months of the year in Roma, with average highs near 34.9°C and lows around 20.6°C (mean 27.8°C). It is a relatively wet time of year, averaging 72 mm of rainfall and 52% relative humidity across the period.
January is one of the warmer months of the year in Roma. Across 45 years of records, the warmest January in Roma was 2019 — when the month averaged 30.1°C — while the coldest was 1984 at 24.9°C. Typical January days reach 34.9°C with nights near 20.6°C. The long-term trend is warming, about 0.3°C per decade.
January is a relatively wet time of year in Roma, averaging 72 mm of rainfall. The wettest January on record was 1996 with 205 mm, while the driest was 2018 at 1 mm.
Relative humidity in Roma during January averages 52%. The most humid January was 2011 at 73%, and the least humid was 2003 at 34%.
January receives about 7.4 kWh/m²/day of solar energy in Roma. The sunniest January was 2019 at 8.4 kWh/m²/day, and the cloudiest was 2008 at 6.2.
Average wind speed in Roma during January is 3.1 m/s. The windiest Januarys were 2013 and 2019 at 3.8 m/s, while the calmest was 1996 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.2°C | 27.8°C | 27.6°C | 27.9°C | 28.8°C | +1.6°C |
| Avg High | 34.5°C | 35.0°C | 34.8°C | 34.9°C | 35.9°C | +1.4°C |
| Avg Low | 19.9°C | 20.6°C | 20.5°C | 20.8°C | 21.7°C | +1.8°C |
| Avg Rain | 83 mm | 80 mm | 78 mm | 61 mm | 47 mm | -36 mm |
January temperatures in Roma have risen by about 1.7°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 12.8°C (2000) to a record high of 45.8°C (2014).
Rainfall in January is a relatively wet time of year, averaging 72 mm, with a wettest year of 205 mm.
A quieter season to visit Roma
If your dates are flexible, the more temperate months of October and April tend to be the most comfortable for visiting Roma. That said, January — with days averaging 34.9°C and nights around 20.6°C (mean 27.8°C) and moderate rainfall (72 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 37.0°C | 29.2°C | 21.3°C | 43.9°C | 16.6°C | 31 mm | 46% | 3.3 m/s | 7.9 |
| 2024 | 35.8°C | 29.4°C | 23.1°C | 41.4°C | 19.1°C | 93 mm | 59% | 2.9 m/s | 7 |
| 2023 | 36.2°C | 29.1°C | 22.1°C | 39.9°C | 18.3°C | 15 mm | 44% | 3.1 m/s | 6.4 |
| 2022 | 35.7°C | 28.6°C | 21.4°C | 40.8°C | 16.9°C | 12 mm | 52% | 3.4 m/s | 7.6 |
| 2021 | 34.1°C | 27.0°C | 19.9°C | 38.1°C | 15.6°C | 49 mm | 51% | 3 m/s | 7.2 |
| 2020 | 36.5°C | 29.4°C | 22.4°C | 41.1°C | 18.9°C | 81 mm | 50% | 3.1 m/s | 7.5 |
| 2019 🔥 | 38.1°C | 30.1°C | 22.0°C | 41.4°C | 20.2°C | 2 mm | 39% | 3.8 m/s | 8.4 |
| 2018 | 38.0°C | 29.8°C | 21.7°C | 42.7°C | 16.2°C | 1 mm | 38% | 3.3 m/s | 8.2 |
| 2017 | 36.4°C | 29.3°C | 22.2°C | 40.0°C | 19.1°C | 68 mm | 54% | 3.2 m/s | 7.4 |
| 2016 | 34.5°C | 27.5°C | 20.4°C | 39.0°C | 17.3°C | 87 mm | 54% | 2.9 m/s | 7.1 |
| 2015 | 32.5°C | 26.1°C | 19.8°C | 38.0°C | 16.1°C | 86 mm | 62% | 2.8 m/s | 7.1 |
| 2014 | 36.7°C | 28.9°C | 21.1°C | 45.8°C | 16.6°C | 24 mm | 40% | 3.6 m/s | 7.6 |
| 2013 | 36.7°C | 29.4°C | 22.1°C | 43.6°C | 17.9°C | 63 mm | 49% | 3.8 m/s | 7.3 |
| 2012 | 31.4°C | 25.3°C | 19.1°C | 38.0°C | 12.9°C | 172 mm | 65% | 2.9 m/s | 6.5 |
| 2011 | 31.1°C | 25.2°C | 19.4°C | 38.4°C | 16.3°C | 46 mm | 73% | 2.8 m/s | 7.5 |
| 2010 | 33.9°C | 26.9°C | 19.8°C | 38.3°C | 13.1°C | 67 mm | 55% | 3 m/s | 7.2 |
| 2009 | 34.0°C | 27.2°C | 20.5°C | 39.3°C | 17.8°C | 41 mm | 56% | 3.1 m/s | 6.9 |
| 2008 | 30.6°C | 25.1°C | 19.5°C | 35.4°C | 15.8°C | 170 mm | 71% | 3.1 m/s | 6.2 |
| 2007 | 34.8°C | 27.6°C | 20.5°C | 39.0°C | 15.9°C | 76 mm | 53% | 3 m/s | 7.3 |
| 2006 | 37.1°C | 30.0°C | 23.0°C | 43.5°C | 19.4°C | 27 mm | 45% | 3.3 m/s | 7.5 |
| 2005 | 35.6°C | 27.8°C | 20.0°C | 41.0°C | 14.6°C | 41 mm | 48% | 3.1 m/s | 7.7 |
| 2004 | 33.9°C | 27.5°C | 21.1°C | 42.4°C | 16.9°C | 180 mm | 59% | 3.1 m/s | 7.3 |
| 2003 | 37.7°C | 29.3°C | 21.0°C | 44.5°C | 17.6°C | 7 mm | 34% | 3.4 m/s | 8 |
| 2002 | 35.2°C | 27.7°C | 20.3°C | 40.2°C | 16.0°C | 70 mm | 47% | 2.8 m/s | 7.3 |
| 2001 | 36.4°C | 28.8°C | 21.2°C | 42.7°C | 15.6°C | 69 mm | 46% | 3 m/s | 7.9 |
| 2000 | 32.4°C | 25.1°C | 17.8°C | 40.2°C | 12.8°C | 101 mm | 58% | 3 m/s | 7.5 |
| 1999 | 34.5°C | 27.5°C | 20.5°C | 39.3°C | 17.0°C | 128 mm | 59% | 3 m/s | 7.4 |
| 1998 | 36.3°C | 29.3°C | 22.2°C | 40.6°C | 18.1°C | 28 mm | 48% | 3 m/s | 7.3 |
| 1997 | 33.3°C | 26.3°C | 19.3°C | 38.3°C | 15.9°C | 122 mm | 47% | 3.3 m/s | 6.9 |
| 1996 🌧️ | 31.5°C | 25.6°C | 19.7°C | 39.2°C | 16.2°C | 205 mm | 70% | 2.7 m/s | 7 |
| 1995 | 34.1°C | 27.0°C | 19.8°C | 38.7°C | 14.1°C | 96 mm | 55% | 3.5 m/s | 7.5 |
| 1994 | 37.5°C | 29.5°C | 21.6°C | 43.4°C | 18.4°C | 19 mm | 40% | 3.3 m/s | 7.9 |
| 1993 | 34.8°C | 27.9°C | 21.0°C | 39.9°C | 18.1°C | 33 mm | 51% | 3 m/s | 7.5 |
| 1992 | 37.1°C | 28.7°C | 20.3°C | 40.3°C | 15.5°C | 32 mm | 40% | 2.8 m/s | 8 |
| 1991 | 33.6°C | 26.7°C | 19.8°C | 39.6°C | 13.8°C | 108 mm | 58% | 3.2 m/s | 7 |
| 1990 | 37.2°C | 29.3°C | 21.5°C | 43.1°C | 17.1°C | 27 mm | 40% | 3.2 m/s | 8.1 |
| 1989 | 34.7°C | 26.9°C | 19.1°C | 39.8°C | 15.0°C | 51 mm | 48% | 3.1 m/s | 7.8 |
| 1988 | 35.5°C | 27.8°C | 20.1°C | 41.4°C | 16.0°C | 68 mm | 48% | 3.2 m/s | 8.1 |
| 1987 | 34.8°C | 28.3°C | 21.8°C | 41.0°C | 19.6°C | 138 mm | 60% | 2.8 m/s | 7.1 |
| 1986 | 34.3°C | 26.6°C | 18.9°C | 38.3°C | 15.1°C | 32 mm | 46% | 3 m/s | 7.8 |
| 1985 | 36.7°C | 28.4°C | 20.1°C | 40.6°C | 16.6°C | 49 mm | 43% | 2.9 m/s | 8.1 |
| 1984 ❄️ | 30.6°C | 24.9°C | 19.3°C | 35.1°C | 13.6°C | 195 mm | 67% | 3.2 m/s | 6.5 |
| 1983 | 35.3°C | 27.3°C | 19.2°C | 40.2°C | 13.9°C | 45 mm | 45% | 3 m/s | — |
| 1982 | 34.6°C | 27.8°C | 21.0°C | 42.2°C | 14.9°C | 122 mm | 58% | 3.1 m/s | — |
| 1981 | 33.9°C | 26.8°C | 19.7°C | 41.4°C | 16.3°C | 43 mm | 53% | 3.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 34.9°C with lows near 20.6°C (mean 27.8°C), based on 45 years of NASA POWER data.
January averages 72 mm of rainfall in Roma, a relatively wet time of year. The wettest on record was 205 mm in 1996.
The hottest January reached 45.8°C in 2014. The coldest dipped to 12.8°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.7°C. Daytime highs moved from 34.2°C to 35.8°C and overnight lows from 19.9°C to 21.6°C over the same span.
January is one of the warmer months of the year in Roma and a relatively wet time of year, so plan for around 34.9°C daytime highs and 20.6°C at night.
Not quite — January is the 12th coolest month in Roma, averaging 27.8°C.
For January in Roma, pack light, breathable clothing and sun protection, with typical highs of 34.9°C and lows of 20.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 52% — relatively dry.
Average wind speed in January is 3.1 m/s. The windiest January on record averaged 3.8 m/s (2013).
The wettest January on record was 1996 with 205 mm. On average, January sees 72 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Roma behaves each January, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for January specifically, along with year-by-year records and how the month has changed over the decades.
