Newmarket weather
Temperature, rain and wind in Newmarket (Ontario, Canada), a city of about 91,034 people: how it is right now, hour by hour into tomorrow, the next 7 days and what each month of the year is like.
Right now
Thursday 15 October, 21:00 (America/Toronto)
8 °C
Rain
Feels like
6 °C
Humidity
79%
Wind
16 km/h
ESE · Beaufort 3
Dew point
5 °C
Cloud cover
100%
Pressure
1,016 hPa
Hour by hour
Next 24 hours, in the city’s local time.
| Time | Conditions | Temperature | Rain | Wind |
|---|---|---|---|---|
| 20:00 | Cloudy | 8 °C | 0.0 mm | 15 km/h |
| 21:00 | Rain | 8 °C | 0.3 mm | 16 km/h |
| 22:00 | Rain | 9 °C | 0.8 mm | 17 km/h |
| 23:00 | Rain | 9 °C | 0.8 mm | 17 km/h |
| 00:00 | Rain | 10 °C | 0.8 mm | 17 km/h |
| 01:00 | Heavy rain | 10 °C | 1.3 mm | 15 km/h |
| 02:00 | Heavy rain | 10 °C | 2.2 mm | 9 km/h |
| 03:00 | Heavy rain | 11 °C | 1.4 mm | 8 km/h |
| 04:00 | Rain | 11 °C | 0.4 mm | 8 km/h |
| 05:00 | Cloudy | 11 °C | 0.0 mm | 8 km/h |
| 06:00 | Cloudy | 12 °C | 0.0 mm | 10 km/h |
| 07:00 | Cloudy | 13 °C | 0.0 mm | 12 km/h |
| 08:00 | Light rain | 13 °C | 0.1 mm | 14 km/h |
| 09:00 | Light rain | 15 °C | 0.2 mm | 17 km/h |
| 10:00 | Cloudy | 17 °C | 0.0 mm | 23 km/h |
| 11:00 | Rain | 17 °C | 0.3 mm | 24 km/h |
| 12:00 | Cloudy | 12 °C | 0.0 mm | 28 km/h |
| 13:00 | Cloudy | 11 °C | 0.0 mm | 23 km/h |
| 14:00 | Cloudy | 11 °C | 0.0 mm | 25 km/h |
| 15:00 | Cloudy | 10 °C | 0.0 mm | 29 km/h |
| 16:00 | Cloudy | 10 °C | 0.0 mm | 27 km/h |
| 17:00 | Cloudy | 10 °C | 0.0 mm | 25 km/h |
| 18:00 | Cloudy | 9 °C | 0.0 mm | 24 km/h |
| 19:00 | Cloudy | 8 °C | 0.0 mm | 23 km/h |
Next 7 days
| Day | Conditions | Low | High | Rain outlook |
|---|---|---|---|---|
| Thu 15/10 | Cloudy | 8 °C | 11 °C | rain likely · 1.9 mm |
| Fri 16/10 | Cloudy | 2 °C | 17 °C | rain possible · 6.7 mm |
| Sat 17/10 | Clear sky | 2 °C | 8 °C | no rain expected · 0.0 mm |
| Mon 19/10 | Clear sky | 4 °C | 18 °C | no rain expected · 0.0 mm |
| Tue 20/10 | Clear sky | 4 °C | 17 °C | no rain expected · 0.0 mm |
| Wed 21/10 | Clear sky | 4 °C | 17 °C | no rain expected · 0.0 mm |
| Thu 22/10 | Clear sky | 4 °C | 16 °C | no rain expected · 0.0 mm |
This column is our own reading: the global model does not publish a probability of precipitation for this region, so we classify the day from the forecast symbol and the total in millimetres. It is not an official probability figure.
America/Toronto
What each number means
- Rain (mm)
- 1 millimetre of rain is 1 litre of water per square metre. Up to 2 mm in a day is drizzle; from 10 mm it is proper rain; more than 50 mm in a few hours is the amount that floods streets.
- Humidity
- Relative humidity is how much water vapour the air holds compared with the most it can hold at that temperature. Above 80% sweat evaporates slowly and heat feels worse; below 30% your throat and eyes dry out.
- Dew point
- The dew point is the temperature at which the air would start to condense. The closer it is to the air temperature, the muggier it feels. Above 20 °C the air already feels heavy.
- Feels like
- "Feels like" combines temperature, wind and humidity: strong wind carries heat away from the body, so it feels colder than the thermometer; high humidity in the heat makes it feel warmer.
- Wind
- Wind is given as a speed and the direction it blows from. Up to 20 km/h you barely notice it; at 40 km/h it moves branches and parasols; above 60 km/h it brings down trees and roof tiles.
- Cloud cover
- Cloud cover as a percentage is how much of the sky is covered. Up to 20% is a clear sky; above 80% the sun barely gets through.
- Chance of rain
- The model does not publish a probability of precipitation for this region. This column is our own reading: the global model does not publish a probability of precipitation for this region, so we classify the day from the forecast symbol and the total in millimetres. It is not an official probability figure.
Month-by-month climate
In October, Newmarket averages 10 °C and about 70 mm of rain over the month, on the 25-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2025) climatology.
Warmest month
July
Coldest month
January
Wettest month
October
Driest month
February
| Month | Mean temperature | Rain | Mean humidity |
|---|---|---|---|
| January | -6 °C | 52 mm | 91% |
| February | -6 °C | 47 mm | 89% |
| March | -1 °C | 51 mm | 83% |
| April | 5 °C | 66 mm | 79% |
| May | 12 °C | 67 mm | 76% |
| June | 18 °C | 66 mm | 71% |
| July | 22 °C | 64 mm | 65% |
| August | 21 °C | 55 mm | 67% |
| September | 17 °C | 59 mm | 71% |
| October | 10 °C | 70 mm | 78% |
| November | 3 °C | 64 mm | 84% |
| December | -3 °C | 60 mm | 89% |
Frequently asked questions
- Will it rain tomorrow in Newmarket?
- rain possible. Rain: 6.7 mm. Low 2 °C, High 17 °C.
- What is the temperature in Newmarket right now?
- 8 °C, rain. Feels like: 6 °C. Humidity: 79%.
- What will the weather be like at the weekend in Newmarket?
- Sat 17/10: clear sky, 2 °C / 8 °C, no rain expected.
- Which is the wettest month in Newmarket?
- October — ~70 mm (25-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2025), NASA POWER).
- How far ahead does this Newmarket forecast go?
- This page shows 7 days. The model run used here is from 15/10/2026, 23:18 UTC, and the page fetches a new one every 30 minutes.
Nearby cities
Forecasts for places near Newmarket:
- Aurora 6 km
- East Gwillimbury 6 km
- Whitchurch-Stouffville 13 km
- Stouffville 20 km
- Richmond Hill 20 km
- Keswick 22 km
- Vaughan 24 km
- Markham 26 km
How to read this page
How to read the min and the max
The week’s high (18 °C) arrives in the afternoon, about two hours after solar noon; the low (2 °C) just before sunrise. Both are air temperature in the shade, two metres above ground — in direct sun or over asphalt a thermometer reads higher.
Where this number comes from
The Newmarket forecast comes from MET Norway, a partir do ECMWF HRES e, na área nórdica, do MEPS, run of 15/10/2026, 23:18 UTC. The month-by-month climate comes from NASA POWER, climatology of 25-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2025). Both are credited in full at the foot of this page.
What a forecast cannot promise
Out to two days accuracy is high; by day seven the trend matters more than the exact figure. For Newmarket the model publishes no rain probability, so the expectation column is our reading.
Severe weather warnings
This page is informational. For official warnings of storms, gales or flooding affecting Newmarket, go to your national weather service through the World Meteorological Organization warning portal.
Understanding the weather and climate of Newmarket
Is this week in Newmarket above or below the October normal?
The average of the next 7 days in Newmarket works out at 9 °C, against a normal of 10 °C for October over 25-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2025). The gap is under one degree, so the week sits squarely inside what the season normally brings.
Within the week the highest maximum lands on Mon 19/10 (18 °C) and the lowest minimum on Sat 17/10 (2 °C). Forecast rain adds up to 8.6 mm, roughly 12% of everything Newmarket gets in an average October (70 mm). The wettest day is Fri 16/10, with 6.7 mm.
When is the wettest and the driest month in Newmarket?
On the 25-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2025) climatology, the wettest month in Newmarket is October, at about 70 mm, and the driest is February, at 47 mm. The two extremes differ by only 1.5 times, which means rain is spread fairly evenly across the year in Newmarket. For October, the month you are reading this in, the average is 70 mm.
What does the dew point say about how Newmarket feels?
Right now in Newmarket the air is at 8 °C with a dew point of 5 °C and relative humidity of 79%. With the two values that close, sweat evaporates slowly and the heat weighs more than the thermometer suggests — that is the working definition of muggy.
What is the climate of Newmarket like through the year?
The warmest month in Newmarket is July (22 °C on average) and the coldest is January (-6 °C), a swing of about 28 °C around an annual mean of 8 °C. A swing above twenty degrees is continental: summer and winter are almost two climates at the same address.
Because Newmarket lies in the northern hemisphere, at 44.05° north, summer falls in June, July and August, in the middle of the calendar.
How far is Newmarket from Richmond Hill?
The nearest large city to Newmarket is Richmond Hill, about 20 km away in a straight line, to the south, with 202,022 inhabitants. In that band the temperature of the two rarely differs by more than a degree or two, but a summer downpour can hit one and miss the other: heat showers are only a few kilometres wide. Being larger, Richmond Hill shows up in more searches, and plenty of people end up reading its forecast assuming it covers Newmarket.
Words on this page
Apparent temperature
The temperature the body actually feels, rather than the one on the thermometer. It combines air temperature with wind, which carries heat away faster, and humidity, which slows the evaporation of sweat. That is why 30 °C in dry air with a breeze is easier than 28 °C in still, muggy air.
Dew point
The temperature air would have to cool to, at constant pressure and moisture, for water to start condensing. The closer the dew point sits to the air temperature, the less room the vapour has and the muggier the day feels.
Millimetre of rain
The depth of water rain would leave on a flat surface with no run-off. One millimetre is one litre per square metre, no matter how large the area measured is.
Standard definition by World Meteorological Organization (WMO) · Millimetre of rain
Relative humidity
How much water vapour the air holds compared with the most it could hold at that temperature, as a percentage. Because that ceiling rises with heat, the same amount of vapour reads high at dawn and low in the afternoon.
Climate normal
The average of a climate element — temperature, rainfall, humidity — computed over a long, standardised period, usually thirty years. It does not predict anything: it says what is typical for that place in that month, and gives you a ruler for calling a week warm or wet.
Standard definition by World Meteorological Organization (WMO) · Climate normal
Forecast model
A program that solves the equations of the atmosphere on a grid of points and steps forward in time from the state observed now. Your city forecast is the model value at the nearest grid point, which is why two neighbouring towns get almost the same numbers.
Standard definition by MET Norway (Meteorologisk institutt) · Forecast model
Model run
The time the model was executed with the latest observations. Every forecast belongs to a run, and runs age: one from six hours ago knows nothing about the shower that started afterwards. It is the first thing to check when two sources disagree.
Standard definition by MET Norway (Meteorologisk institutt) · Model run
Source, model and licence
- Model
- MET Norway, a partir do ECMWF HRES e, na área nórdica, do MEPS
- Model run
- 15/10/2026, 23:18 UTC
- Source
- MET Norway (Meteorologisk institutt) — Locationforecast 2.0 — Based on data from MET Norway. Licence: CC BY 4.0 / NLOD 2.0.
- Month-by-month climate
- NASA POWER — Climatology (MERRA-2, 2001–2020) — The data was obtained from National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project — Climatology API v2. Dados públicos da NASA, citação obrigatória.
- Cities, coordinates and population
- Dados de cidades: GeoNames (CC BY 4.0)
The page fetches fresh data every 30 minutes. Informational content. For severe weather warnings, follow your country’s official weather service and civil protection authority.