Yearly & Monthly weather

The climate of Grafton
The best time to visit Grafton
The worst time to visit Grafton
Spring weather in Grafton
Summer weather in Grafton
Autumn weather in Grafton
Winter weather in Grafton
Weather in January
Weather in February
Weather in March
Weather in April
Weather in May
Weather in June
Weather in July
Weather in August
Weather in September
Weather in October
Weather in November
Weather in December
Frequently asked questions
Average temperature
Average pressure
Average wind speed
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

The climate of Grafton

Grafton, located in North Dakota, USA, has a predominate Köppen climate classification of Dfb. This refers to a type of climate that is characterized as humid continental, with no dry season and warm summers. Throughout the year, its climate remains rather unique due to its geographical position. Responding to the change of seasons, monthly variations in temperature, humidity, rainfall, and other climate parameters occur.

An analysis of the climatic information reveals that temperatures swing between an average high of 80.4°F (26.9°C) in the warmest month of August and an average low of 0.9°F (-17.3°C) in January, the coldest month. Humidity levels are relatively stable, with slight changes across the months - generally, the relative humidity hovers between a maximum of 91% in January and a minimum of 59% in August.

The average rainfall ranges from 0.55" (14mm) in the dryer months of January and February, reaching a peak of 2.8" (71mm) in June. Interestingly, the number of rainfall days shows a similar pattern, making June the wettest month with an average of 15.9 days in contrast to February’s average of only 1.6 days. The city also experiences a fair share of snowfall from November to April, with December and January being the peak months.

There is over 16 hours of daylight in June and July, and around 11 hours of sunshine in July. The climate data also shows that wind speeds vary minimally, with an average of 10.6mph (17.1km/h) in October to 8.1mph (13km/h) in July and August.

The best time to visit Grafton

The preferred time for visiting Grafton would be during the warm summer months, between June and August. In this period, temperatures average between 73°F (22.8°C) to 80.4°F (26.9°C), making it ideal for outdoor activities. There is ample daylight, with around 15.6 to 16 hours per day, and plentiful sunshine, approximately 10.6 to 11 hours daily. Despite June being the wettest month in terms of rainfall, it also offers the longest daylight duration among all months, maximizing outdoor enjoyment and exploration.

The worst time to visit Grafton

Conversely, the harshest months to visit Grafton would be in the winter, more specifically from December to February. During these months, the temperatures plummet to their lowest, dipping to between 0.9°F (-17.3°C) to 2.3°F (-16.5°C). Also, these months experience the highest amount of snowfall, up to 3.94" (100mm) of snow in December. Coupled with the shorter daylight hours - 8.9 to 9.2 hours, and limited sunshine - 3.2 to 3.6 hours, outside activities are greatly restricted.

Spring weather in Grafton

Spring, spanning from March to May in Grafton, witnesses transition in weather conditions. The temperatures begin to climb, moving from 32.5°F (0.3°C) in March to a comfortable 64.6°F (18.1°C) by May. Simultaneously, the spring sees increased rainfall, averaging from 0.87" (22mm) in March to 2.01" (51mm) in May, alongside longer daylight hours and more sunshine, making the weather conducive for being outdoors.

Summer weather in Grafton

The months of June to August constitute summer with temperatures escalating, reaching their prime at 80.4°F (26.9°C) in August. It is also the wettest season with rainfall peaking in June before descending gradually. Strong winds are minimal during summer, averaging between 8.1 to 8.7mph (14km/h), making it the calmest season. Grafton gets its longest hours of daylight and sunshine in the summer, providing ample opportunities for visitors to explore and enjoy the outdoor sights.

Autumn weather in Grafton

Autumn, which lasts from September to November, heralds a cooling period for Grafton. Average temperatures begin to drop from 70.5°F (21.4°C) in September to 34.9°F (1.6°C) in November. Rainfall decreases as well, from 1.81" (46mm) in September to 0.63" (16mm) in November, while hours of daylight dwindle. Despite this, the pleasant autumn scenery of changing foliage colors can be a charming sight for visitors.

Winter weather in Grafton

Winter sets in from December to February, and it is when Grafton witnesses its coldest temperatures and maximum snowfall. The temperatures fall steeply to between 0.9°F (-17.3°C) to 2.3°F (-16.5°C). Furthermore, daylight is significantly reduced to approximately 9.2 hours in December, and even less in January and February. Coupled with increased cloud cover and slower wind speeds, winters in Grafton offer a chilly yet serene landscape.

Weather in January

January in Grafton, North Dakota, is the coldest of all months. It features the chilling climax of winter along with low visibility. Heavy snowfall is common with 3.23" (82mm) on average. As the month unfolds, a slight improvement in weather conditions is noted but the cold grip of winter still holds strong. Weather in January »

Weather in February

Change remains minimal as winter carries into February. The majority of days are still cold with a predominant frosty ambiance. Inclement weather invites a significant snowfall of 3.15" (80mm). While not a drastic change from January, there's a subtle upward trend in temperature by month's end. Weather in February »

Weather in March

Winter losses its grip slightly in March, hinting at the approach of spring. Daylight hours increase, indicative of the seasonal transition. Precipitation levels rise but snowfall decreases to 2.56" (65mm). Despite the cold winds and chill, March showcases the resilience of Grafton's residents, unyielding to the cruel twists and turns of North Dakota weather. Weather in March »

Weather in April

In April, Grafton breaks free from winter's clutch with the onset of spring. The city begins to rejuvenate with longer periods of sunshine. As spring gains momentum, the average snowfall drastically decreases to just 1.69" (43mm). Residents bid farewell to winter with a sense of relief and start embracing the pleasant warmth. Weather in April »

Weather in May

May heralds the establishment of spring, with floral bloom gracing the cityscapes of Grafton. Lighter apparel starts replacing heavy winter wear as the days continue to warm. A significantly high rainfall volume of 2.01" (51mm) sets in, making May one of the wettest months. Weather in May »

Weather in June

June sees a considerable escalation in temperature, marking the arrival of summer. The sun shines longer, illuminating Grafton in its full glory. Rainfall peaks to its annual high of 2.8" (71mm), providing some respite from the rising temperatures. Weather in June »

Weather in July

The heat soars in July as summer hits its zenith. Daily oleasure in water-based recreational activities heighten. Amidst the hot conditions, Grafton receives around 1.97" (50mm) of rain. So, while the temperatures may be high, the weather remains generally comfortable. Weather in July »

Weather in August

August continues the reign of summer but hints at its eventual close. The luster of the season remains intact, with generous hours of sunshine. The precipitation drops to 1.18" (30mm) as compared to the previous high of July. August beautifully caps off the summer, making way for the gradual transition into the cooler months ahead. Weather in August »

Weather in September

September in Grafton ushers in the autumnal transition, shedding the summer heat for milder temperatures. The leaves start changing color, painting the city in shades of orange and brown. Despite the transition, rainfall remains significant at 1.81" (46mm). Weather in September »

Weather in October

October advances the Fall season further, with colorful foliage adorning Grafton. Light jackets resurface as temperatures continue to dip. A significant drop is noticeable in rainfall with a total of just 1.69" (43mm) in October. Weather in October »

Weather in November

November introduces the onset of winter, with temperatures falling steadily. Winter wear comes into play, dominating the fashion scene locally. Snowflakes start making an appearance with an average snowfall of 2.8" (71mm). As Grafton embraces the chilly winter, citizens prepare themselves for the return of a season synonymous with cozy fireplaces and hot beverages. November's arrival brings a noticeable temperature shift, dropping from a fresh 52.3°F (11.3°C) in October to a wintry 34.9°F (1.6°C). Weather in November »

Weather in December

By December, Grafton firmly falls under winter's rule. Daylight hours decrease significantly, further amplifying the cold. Under the snowy blanket that reaches a depth of 3.94" (100mm), Grafton transforms into a winter wonderland. Weather in December »

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Grafton?

The lowest temperatures in Grafton are recorded in January, with averages reaching a high of 14.7°F (-9.6°C) and a low of 0.9°F (-17.3°C).

What is the most humid month in Grafton?

With an average relative humidity of 91%, January is the most humid month.

What is the driest month in Grafton?

January and February are months with the least rain when the rain falls for 2.9 days and typically aggregates up to 0.55" (14mm) of rain.

How much does it rain in Grafton?

In Grafton, North Dakota, during the entire year, the rain falls for 97.8 days and collects up to 15.83" (402mm) of precipitation.

When does it snow in Grafton?

January through May, October through December are months with snowfall in Grafton, North Dakota.

How many days does it snow in Grafton?

In Grafton, during the entire year, snow falls for 70.4 days and aggregates up to 18.46" (469mm) of snow.

What is the month with the least sunshine in Grafton?

January has the least sunshine of the year, with an average of 3.2h of sunshine.

When is the lowest UV index in Grafton?

January, February and November, with an average maximum UV index of 1, are months with the lowest UV index.

When is Daylight Saving Time (DST) in Grafton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grafton, North Dakota, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Grafton?

The month with the most rainfall in Grafton, North Dakota, is June, when the rain falls for 15.9 days and typically aggregates up to 2.8" (71mm) of precipitation.

When it does not snow in Grafton?

June through September are months without snowfall.

When are the longest days in Grafton?

With an average of 16h and 0min of daylight, June has the longest days of the year.

What month has the most sunshine in Grafton?

With an average of 11h of sunshine, July has the most sunshine of the year in Grafton, North Dakota.

What is the month with the highest UV index in Grafton?

The month with the highest UV index is July, with an average maximum UV index of 6.

What are the warmest months in Grafton?

In Grafton, North Dakota, the peak temperatures are generally noted in August, averaging a high of 80.4°F (26.9°C) and a low of 59°F (15°C).

What is the least humid month in Grafton?

With an average relative humidity of 59%, August is the least humid month.

What is the snowiest month in Grafton?

The month with the most snowfall in Grafton is December, when snow falls for 14 days and typically aggregates up to 3.94" (100mm) of snow.

What is the month with the shortest days in Grafton?

December has the shortest days of the year in Grafton, North Dakota, with an average of 8h and 24min of daylight.

Average temperature
Grafton, ND

Average high temperature in January:
14.7°F
Average high temperature in February:
16.9°F
Average high temperature in March:
32.5°F
Average high temperature in April:
48.9°F
Average high temperature in May:
64.6°F
Average high temperature in June:
73°F

Average high temperature in July:
79.5°F
Average high temperature in August:
80.4°F
Average high temperature in September:
70.5°F
Average high temperature in October:
52.3°F
Average high temperature in November:
34.9°F
Average high temperature in December:
18.3°F

The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is January (14.7°F).

Average low temperature in January:
0.9°F
Average low temperature in February:
2.3°F
Average low temperature in March:
19°F
Average low temperature in April:
34°F
Average low temperature in May:
47.8°F
Average low temperature in June:
55.2°F

Average low temperature in July:
59.9°F
Average low temperature in August:
59°F
Average low temperature in September:
51.6°F
Average low temperature in October:
39°F
Average low temperature in November:
23.5°F
Average low temperature in December:
7.5°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).

Average pressure
Grafton, ND

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed
Grafton, ND

The windiest month (with the highest average wind speed) is October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).

Average humidity
Grafton, ND

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (59%).

Average rainfall
Grafton, ND

The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are January and February (0.55").

Average rainfall days
Grafton, ND

Average rainfall days in January:
2.9 days
Average rainfall days in February:
1.6 days
Average rainfall days in March:
7.6 days
Average rainfall days in April:
10.2 days
Average rainfall days in May:
13 days
Average rainfall days in June:
15.9 days

Average rainfall days in July:
12.5 days
Average rainfall days in August:
9.2 days
Average rainfall days in September:
8.7 days
Average rainfall days in October:
9.1 days
Average rainfall days in November:
4.6 days
Average rainfall days in December:
2.5 days

The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.6 days).

Average snowfall
Grafton, ND

The month with the highest snowfall is December (3.94").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Grafton, ND

Average snowfall days in January:
14.7 days
Average snowfall days in February:
12.9 days
Average snowfall days in March:
10.6 days
Average snowfall days in April:
5.4 days
Average snowfall days in May:
0.4 days
Average snowfall days in June:
0 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
0 days
Average snowfall days in October:
2.7 days
Average snowfall days in November:
9.7 days
Average snowfall days in December:
14 days

The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Grafton, ND

Average daylight in January:
8h and 5min
Average daylight in February:
10h and 1min
Average daylight in March:
11h and 5min
Average daylight in April:
13h and 4min
Average daylight in May:
15h and 2min
Average daylight in June:
16h and 0min

Average daylight in July:
15h and 4min
Average daylight in August:
14h and 2min
Average daylight in September:
12h and 4min
Average daylight in October:
10h and 5min
Average daylight in November:
9h and 1min
Average daylight in December:
8h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

Average sunshine in January:
3h and 1min
Average sunshine in February:
3h and 4min
Average sunshine in March:
4h and 3min
Average sunshine in April:
7h and 2min
Average sunshine in May:
8h and 5min
Average sunshine in June:
9h and 4min

Average sunshine in July:
11h and 0min
Average sunshine in August:
10h and 4min
Average sunshine in September:
8h and 4min
Average sunshine in October:
5h and 2min
Average sunshine in November:
4h and 3min
Average sunshine in December:
3h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

Average sunshine days
Grafton, ND

Average sunshine days in January:
15.8 days
Average sunshine days in February:
15.2 days
Average sunshine days in March:
13.9 days
Average sunshine days in April:
14.9 days
Average sunshine days in May:
15.3 days
Average sunshine days in June:
11.5 days

Average sunshine days in July:
15.9 days
Average sunshine days in August:
19.8 days
Average sunshine days in September:
19.5 days
Average sunshine days in October:
18 days
Average sunshine days in November:
16.5 days
Average sunshine days in December:
17 days

The month with the most sunshine days is August (19.8 days).
The month with the least sunshine days is June (11.5 days).

Average UV index
Grafton, ND

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).

Average cloud cover
Grafton, ND

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 24).

Average visibility
Grafton, ND

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

Climate and monthly weather forecastGrafton, ND

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