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Lanark ON Weather - Sunny
Sunny
63°F
Updated 2:03 pm
Feels Like 55°F
Humidity 42%
Wind NW 11 mph
Barometer  30.18 in
Visibility 6 mi
Lanark ON Weather - Sunny
Sunny
17°C
Updated 2:03 pm
Feels Like 13°C
Humidity 42%
Wind NW 17 km/h
Barometer  102.2 kPa
Visibility 10 km
Lanark, ON Weather and Current Conditionslanark on weather forecast

Lanark, ON Weather Forecast

Lanark Ontario WeatherLanark, Ontario Weather Weather Forecast
14 day API weather forecast for Lanark, Ontario. Note: The 7-day weather forecast for Lanark, ON is the most reliable and accurate weather forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days ahead.
Lanark, ON Weather Forecast Dated: 203 PM Mon Sep 14 2026
Expect a cool pattern with a mix of sun and clouds and mostly dry weather over the coming period. generally humid conditions and a stable pattern will dominate.

Monday, September 14, 2026

Mid-Morning
Lanark Weather - 2026-09-14 - Morning - Sunny
12°C 53°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-14 - Afternoon - Sunny
18°C 64°F
Sunny
Early-Evening
Lanark Weather - 2026-09-14 - Evening - Sunny
14°C 58°F
Sunny
Refreshing around 18°C 64°F, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NW to the NE at 8 km/h 5 mph.

Tuesday, September 15, 2026

Mid-Morning
Lanark Weather - 2026-09-15 - Morning - Overcast
12°C 54°F
Overcast
Mid-Afternoon
Lanark Weather - 2026-09-15 - Afternoon - Overcast
18°C 64°F
Overcast
Early-Evening
Lanark Weather - 2026-09-15 - Evening - Overcast
19°C 66°F
Overcast
Mildly cool near 18°C 64°F, overcast throughout the day, with lower humidity and barometric pressure falling. Winds switching from the SSE to the S at 16 km/h 10 mph. Gusts up to 46 km/h 29 mph.

Wednesday, September 16, 2026

Mid-Morning
Lanark Weather - 2026-09-16 - Morning - Partly Cloudy
19°C 66°F
Partly Cloudy
Mid-Afternoon
Lanark Weather - 2026-09-16 - Afternoon - Partly Cloudy
22°C 71°F
Partly Cloudy
Early-Evening
Lanark Weather - 2026-09-16 - Evening - Cloudy
18°C 63°F
Cloudy
Enjoyable around 22°C 71°F, partly cloudy through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds moving from the WNW to the NNE at 10 km/h 6 mph.

Thursday, September 17, 2026

Mid-Morning
Lanark Weather - 2026-09-17 - Morning - Overcast
13°C 56°F
Overcast
Mid-Afternoon
Lanark Weather - 2026-09-17 - Afternoon - Partly Cloudy
20°C 68°F
Partly Cloudy
Early-Evening
Lanark Weather - 2026-09-17 - Evening - Cloudy
18°C 64°F
Cloudy
Mild temperatures up to 20°C 68°F, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling.

Friday, September 18, 2026

Mid-Morning
Lanark Weather - 2026-09-18 - Morning - Sunny
14°C 57°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-18 - Afternoon - Sunny
20°C 69°F
Sunny
Early-Evening
Lanark Weather - 2026-09-18 - Evening - Sunny
17°C 62°F
Sunny
Mild with a high of 20°C 69°F, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the N to the E at 7 km/h 4 mph.

Saturday, September 19, 2026

Mid-Morning
Lanark Weather - 2026-09-19 - Morning - Overcast
13°C 55°F
Overcast
Mid-Afternoon
Lanark Weather - 2026-09-19 - Afternoon - Overcast
21°C 71°F
Overcast
Early-Evening
Lanark Weather - 2026-09-19 - Evening - Overcast
19°C 66°F
Overcast
Pleasant near 21°C 71°F, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds shifting from the ESE to the SSW at 9 km/h 5 mph.

Sunday, September 20, 2026

Mid-Morning
Lanark Weather - 2026-09-20 - Morning - Heavy Rain Showers
13°C 55°F
Heavy Rain Showers
Mid-Afternoon
Lanark Weather - 2026-09-20 - Afternoon - Scattered Showers
8°C 47°F
Scattered Showers
Early-Evening
Lanark Weather - 2026-09-20 - Evening - Scattered Showers
8°C 47°F
Scattered Showers
Chilly near 8°C 47°F, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds turning from the SE to the ESE at 20 km/h 12 mph. Gusts up to 45 km/h 28 mph.

Monday, September 21, 2026

Mid-Morning
Lanark Weather - 2026-09-21 - Morning - Sunny
5°C 42°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-21 - Afternoon - Sunny
13°C 55°F
Sunny
Early-Evening
Lanark Weather - 2026-09-21 - Evening - Sunny
10°C 50°F
Sunny
Crisp with a high near 13°C 55°F, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the WSW to the E at 8 km/h 5 mph.

Tuesday, September 22, 2026

Mid-Morning
Lanark Weather - 2026-09-22 - Morning - Sunny
8°C 46°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-22 - Afternoon - Partly Cloudy
18°C 64°F
Partly Cloudy
Early-Evening
Lanark Weather - 2026-09-22 - Evening - Overcast
14°C 57°F
Overcast
Refreshing around 18°C 64°F, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure.

Wednesday, September 23, 2026

Mid-Morning
Lanark Weather - 2026-09-23 - Morning - Sunny
11°C 51°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-23 - Afternoon - Sunny
17°C 63°F
Sunny
Early-Evening
Lanark Weather - 2026-09-23 - Evening - Sunny
13°C 56°F
Sunny
Mildly cool near 17°C 63°F, sunny throughout the day, with steady humidity and steady pressure.

Thursday, September 24, 2026

Mid-Morning
Lanark Weather - 2026-09-24 - Morning - Sunny
11°C 52°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-24 - Afternoon - Sunny
19°C 67°F
Sunny
Early-Evening
Lanark Weather - 2026-09-24 - Evening - Sunny
17°C 62°F
Sunny
Comfortable at 19°C 67°F, sunny throughout the day, with steady humidity and barometric pressure falling. Winds moving from the SW to the NNW at 9 km/h 6 mph.

Friday, September 25, 2026

Mid-Morning
Lanark Weather - 2026-09-25 - Morning - Partly Cloudy
14°C 56°F
Partly Cloudy
Mid-Afternoon
Lanark Weather - 2026-09-25 - Afternoon - Cloudy
21°C 69°F
Cloudy
Early-Evening
Lanark Weather - 2026-09-25 - Evening - Overcast
18°C 64°F
Overcast
Comfortable with temperatures reaching 21°C 69°F, partly cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure.

Saturday, September 26, 2026

Mid-Morning
Lanark Weather - 2026-09-26 - Morning - Sunny
18°C 64°F
Sunny
Mid-Afternoon
Lanark Weather - 2026-09-26 - Afternoon - Overcast
24°C 75°F
Overcast
Early-Evening
Lanark Weather - 2026-09-26 - Evening - Overcast
21°C 70°F
Overcast
Enjoyable around 24°C 75°F, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds swinging from the W to the SSW at 4 km/h 3 mph.

Sunday, September 27, 2026

Mid-Morning
Lanark Weather - 2026-09-27 - Morning - Scattered Showers
17°C 62°F
Scattered Showers
Mid-Afternoon
Lanark Weather - 2026-09-27 - Afternoon - Sunny
20°C 68°F
Sunny
Early-Evening
Lanark Weather - 2026-09-27 - Evening - Sunny
16°C 60°F
Sunny
Mild temperatures up to 20°C 68°F, scattered downpours possible, with lower humidity and barometric pressure rising. Winds shifting from the W to the NE at 10 km/h 6 mph.

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Weather by the Numbers

Mon, 14th
Lanark ON Weather - Monday, Sep 14, 2026 - Sunny
Hi: 18°C 64°F
Lo: 9°C 49°F
Sunrise 06:41 AM
Sunset 07:17 PM
Wind NNW 17 km/h10 mph
Dew Point 5°C40°F
uv Index 5
Barometric Pressure 102.1 kPa30.15 in
POP 2% *
Humidity 48%
Tue, 15th
Lanark ON Weather - Tuesday, Sep 15, 2026 - Overcast
Hi: 19°C 67°F
Lo: 9°C 48°F
Sunrise 06:43 AM
Sunset 07:15 PM
Wind S 17 km/h11 mph
Dew Point 9°C48°F
uv Index 1
Barometric Pressure 102.5 kPa30.27 in
POP 15% *
Humidity 60%
Wed, 16th
Lanark ON Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 22°C 71°F
Lo: 13°C 56°F
Sunrise 06:44 AM
Sunset 07:13 PM
Wind NNW 14 km/h9 mph
Dew Point 10°C50°F
uv Index 5
Barometric Pressure 102.7 kPa30.33 in
POP 2% *
Humidity 50%
Thu, 17th
Lanark ON Weather - Thursday, Sep 17, 2026 - Overcast
Hi: 21°C 69°F
Lo: 12°C 53°F
Sunrise 06:45 AM
Sunset 07:11 PM
Wind E 5 km/h3 mph
Dew Point 9°C48°F
uv Index 4
Barometric Pressure 102.5 kPa30.27 in
POP 16% *
Humidity 63%
Fri, 18th
Lanark ON Weather - Friday, Sep 18, 2026 - Sunny
Hi: 21°C 69°F
Lo: 11°C 51°F
Sunrise 06:46 AM
Sunset 07:09 PM
Wind NE 6 km/h4 mph
Dew Point 6°C43°F
uv Index 5
Barometric Pressure 102.6 kPa30.3 in
POP 1% *
Humidity 45%
Sat, 19th
Lanark ON Weather - Saturday, Sep 19, 2026 - Overcast
Hi: 22°C 72°F
Lo: 10°C 50°F
Sunrise 06:47 AM
Sunset 07:07 PM
Wind S 10 km/h6 mph
Dew Point 8°C47°F
uv Index 4
Barometric Pressure 102.1 kPa30.15 in
POP 11% *
Humidity 50%
Sun, 20th
Lanark ON Weather - Sunday, Sep 20, 2026 - Light Rain Shower
Hi: 16°C 61°F
Lo: 7°C 44°F
Sunrise 06:49 AM
Sunset 07:05 PM
Wind S 14 km/h9 mph
Dew Point 11°C51°F
uv Index 3
Barometric Pressure 101 kPa29.83 in
POP 87% *
Humidity 98%
Mon, 21st
Lanark ON Weather - Monday, Sep 21, 2026 - Sunny
Hi: 13°C 55°F
Lo: 3°C 38°F
Sunrise 06:50 AM
Sunset 07:03 PM
Wind NE 13 km/h8 mph
Dew Point -0°C32°F
uv Index 4
Barometric Pressure 102.8 kPa30.36 in
POP 2% *
Humidity 48%
Tue, 22nd
Lanark ON Weather - Tuesday, Sep 22, 2026 - Sunny
Hi: 18°C 65°F
Lo: 4°C 39°F
Sunrise 06:51 AM
Sunset 07:01 PM
Wind SSW 6 km/h4 mph
Dew Point 6°C42°F
uv Index 4
Barometric Pressure 102.8 kPa30.36 in
POP 3% *
Humidity 54%
Wed, 23rd
Lanark ON Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 17°C 63°F
Lo: 9°C 48°F
Sunrise 06:52 AM
Sunset 06:59 PM
Wind NNE 10 km/h6 mph
Dew Point 5°C41°F
uv Index 5
Barometric Pressure 102.4 kPa30.24 in
POP 2% *
Humidity 50%
Thu, 24th
Lanark ON Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 20°C 67°F
Lo: 9°C 47°F
Sunrise 06:54 AM
Sunset 06:58 PM
Wind N 10 km/h6 mph
Dew Point 8°C46°F
uv Index 5
Barometric Pressure 102 kPa30.12 in
POP 3% *
Humidity 56%
Fri, 25th
Lanark ON Weather - Friday, Sep 25, 2026 - Sunny
Hi: 21°C 70°F
Lo: 11°C 53°F
Sunrise 06:55 AM
Sunset 06:56 PM
Wind NNW 6 km/h4 mph
Dew Point 9°C48°F
uv Index 5
Barometric Pressure 101.9 kPa30.09 in
POP 4% *
Humidity 55%
Sat, 26th
Lanark ON Weather - Saturday, Sep 26, 2026 - Partly Cloudy
Hi: 24°C 75°F
Lo: 15°C 59°F
Sunrise 06:56 AM
Sunset 06:54 PM
Wind NW 15 km/h9 mph
Dew Point 14°C57°F
uv Index 6
Barometric Pressure 101.6 kPa30 in
POP 4% *
Humidity 62%
Sun, 27th
Lanark ON Weather - Sunday, Sep 27, 2026 - Patchy Rain Nearby
Hi: 21°C 69°F
Lo: 12°C 54°F
Sunrise 06:57 AM
Sunset 06:52 PM
Wind NW 20 km/h12 mph
Dew Point 13°C55°F
uv Index 4
Barometric Pressure 101.7 kPa30.03 in
POP 16% *
Humidity 68%
* POP = Probability of Precipitation. Data for 12:00 PM.