The Delaware Peninsula separates the city from the Atlantic Ocean, however, the city overlooks an inlet of the same ocean, the Chesapeake Bay. To the north, the bay receives the waters of the Susquehanna River, while the Patapsco River flows into the sea near Baltimore.
The city is located in an area where different air masses collide: the cold ones coming from Canada and the warm ones coming from the Gulf of Mexico. The result is an
, with waves of bad weather alternating with clear and sunny days. The wind blows frequently as well.
of the coldest month (January) is of 1.3 °C (34 °F), that of the warmest month (July) is of 25.7 °C (78 °F).
, from December to February, is cold: the average temperature is just above freezing (0 °C or 32 °F), but cold spells, during which the temperature can drop to about -10/-15 °C (5/14 °F), are not rare. The
can make the air feel colder than it actually is.
The coldest record is -22 °C (-7.5 °F), recorded in February 1934 and in January 1963.
are frequent, and sometimes can be abundant. On average, 49 centimeters (19 inches) of snow fall annually. However, sometimes the city is located just south of the area where it snows (for example, it may snow in New York and not in Baltimore).
On other occasions, the wind can blow from the south, bringing some mild days, with highs around 12/15 °C (54/59 °F). There are also clear and sunny days, with cold nights, and daytime temperatures mild or in any case acceptable.
: the first warm days alternate with the return of cold weather. In March, it can snow, and this can sometimes happen still in early April. But already in April, the temperature can sometimes exceed 25 °C (77 °F). By May, the average temperature becomes pleasant, although there can still be cool days, or even a little cold and rainy, while the first heat waves can bring the temperature above 30 °C (86 °F). On sunny days, the first
, especially in July and August. There can be days with pleasant temperatures, around 25/27 °C (77/81 °F), maybe with some rain, but more often, there are hot and sultry days, with highs around 30 °C (86 °F). On sunny days,
can occur in the afternoon.
occur, when the temperature reaches 36/38 °C (97/100 °F), and remains high at night, around 23/25 °C (73/77 °F) or above. The record is 41 °C (106 °F), recorded in July 2011.
, from September to November, is milder and less unstable than the other seasons, at least in the first part. In early September, the weather is often still characterized by heat and humidity, with sunshine and some afternoon thunderstorms, then it quickly becomes mild and relatively quiet until mid-October, while in the second half of October, the first cold days may occur. November is by now a cold month, during which the first snowfalls may occur. There is a moderate amount of rainfall also in autumn, but it is still the season in which rainy days are a little less frequent.
hours per year. Even though winter is cold, the sun shines half the time.
temperature ranges between 4.5 °C (40 °F) and 23.5 °C (74 °F). During the most intense cold spells, the sea in the bay can freeze, especially in the northern part, where Baltimore is located. In January 1977, you could walk under the Chesapeake Bay Bridge, 35 km (21 mi) further south, near Annapolis.
to visit Baltimore are spring and autumn, in order to avoid both the winter cold and the summer heat, and in particular, the month of May and from mid-September to mid-October. June is often a good month as well, but sometimes it can be hot. In early September, the weather can be sticky, though not as hot as in midsummer. In April, it can sometimes be cold and the weather can be unstable, especially at the beginning of the month, while the second half of the month is usually mild.
. Here are the average temperatures.
January, the coldest month of the year, is generally a cold month. The average temperature is of
1.3 °C, with a minimum of
-3.7 °C and a maximum of
6.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-12.5 °C. However, it dropped to
-20.6 °C in January 1994.
On the warmest days of the month, the temperature usually reaches around
18 °C. However, it reached
22.2 °C in January 1993.
Precipitation amounts to
80 mm, distributed over 10 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 65%.
The average wind speed is of
12.3 kph.
The average sea temperature is of
5.1 °C. Therefore, the sea is very cold for swimming.
February is generally a cold month. The average temperature is of
2.6 °C, with a minimum of
-2.8 °C and a maximum of
8 °C.
On the coldest nights of the month, the temperature usually drops to around
-11 °C. However, it dropped to
-18.4 °C in February 1996.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
26.1 °C in February 2000.
Precipitation amounts to
75 mm, distributed over 9 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 61%.
The average wind speed is of
12.6 kph.
The average sea temperature is of
4.8 °C. Therefore, the sea is very cold for swimming.
March is generally a quite mild month. The average temperature is of
6.9 °C, with a minimum of
1.1 °C and a maximum of
12.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-15.6 °C in March 2014.
On the warmest days of the month, the temperature usually reaches around
24.5 °C. However, it reached
31 °C in March 1998.
Precipitation amounts to
100 mm, distributed over 11 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 59%.
The average wind speed is of
13.5 kph.
The average sea temperature is of
4.7 °C. Therefore, the sea is very cold for swimming.
April is generally a mild month. The average temperature is of
12.8 °C, with a minimum of
6.4 °C and a maximum of
19.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-1.5 °C. However, it dropped to
-4.4 °C in April 2016.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
34 °C in April 2002.
Precipitation amounts to
85 mm, distributed over 11 days.
The day lasts on average 13 hours and 20 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 59%.
The average wind speed is of
13.1 kph.
The average sea temperature is of
7 °C. Therefore, the sea is very cold for swimming.
May is generally a very mild month. The average temperature is of
18 °C, with a minimum of
11.8 °C and a maximum of
24.2 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
-0.6 °C in May 1996.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
36.7 °C in May 1991.
Precipitation amounts to
100 mm, distributed over 12 days.
The day lasts on average 14 hours and 25 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 66%.
The average wind speed is of
11.1 kph.
The average sea temperature is of
9.1 °C. Therefore, the sea is very cold for swimming.
June is generally a warm to hot month. The average temperature is of
23.1 °C, with a minimum of
17 °C and a maximum of
29.1 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
5 °C in June 2001.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
39.4 °C in June 2012.
Precipitation amounts to
100 mm, distributed over 11 days.
The day lasts on average 14 hours and 55 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 9 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 67%.
The average wind speed is of
10.3 kph.
The average sea temperature is of
16.1 °C. Therefore, the sea is cold for swimming.
July, the hottest month of the year, is generally a warm to hot month. The average temperature is of
25.7 °C, with a minimum of
19.8 °C and a maximum of
31.6 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C. However, it dropped to
10 °C in July 2001.
On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
41.1 °C in July 2011.
Precipitation amounts to
115 mm, distributed over 10 days.
The day lasts on average 14 hours and 35 minutes. So the days are long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 67%.
The average wind speed is of
9.3 kph.
The average sea temperature is of
21.7 °C. Therefore, the sea is cool for swimming.
August is generally a warm to hot month. The average temperature is of
24.5 °C, with a minimum of
18.8 °C and a maximum of
30.3 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C. However, it dropped to
7.2 °C in August 1992.
On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
39 °C in August 2007.
Precipitation amounts to
105 mm, distributed over 10 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 70%.
The average wind speed is of
8.7 kph.
The average sea temperature is of
23.3 °C. Therefore, the sea can be considered barely acceptable for swimming.
September is generally a warm month. The average temperature is of
20.7 °C, with a minimum of
14.9 °C and a maximum of
26.5 °C.
On the coldest nights of the month, the temperature usually drops to around
7.5 °C. However, it dropped to
4 °C in September 2000.
On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
36.7 °C in September 1991.
Precipitation amounts to
115 mm, distributed over 9 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
9.5 kph.
The average sea temperature is of
21 °C. Therefore, the sea is cool for swimming.
October is generally a mild month. The average temperature is of
14.1 °C, with a minimum of
8.1 °C and a maximum of
20.2 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-3.3 °C in October 2001.
On the warmest days of the month, the temperature usually reaches around
29 °C. However, it reached
36.7 °C in October 2019.
Precipitation amounts to
100 mm, distributed over 9 days.
The day lasts on average 11 hours and 5 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
9.8 kph.
The average sea temperature is of
15 °C. Therefore, the sea is cold for swimming.
November is generally a quite mild month. The average temperature is of
8.3 °C, with a minimum of
2.5 °C and a maximum of
14.1 °C.
On the coldest nights of the month, the temperature usually drops to around
-5 °C. However, it dropped to
-7.8 °C in November 1991.
On the warmest days of the month, the temperature usually reaches around
23.5 °C. However, it reached
27.2 °C in November 2003.
Precipitation amounts to
80 mm, distributed over 8 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 66%.
The average wind speed is of
10.7 kph.
The average sea temperature is of
11.3 °C. Therefore, the sea is very cold for swimming.
December is generally a cold month. The average temperature is of
3.6 °C, with a minimum of
-1.3 °C and a maximum of
8.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-9 °C. However, it dropped to
-14.4 °C in December 2002.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
25 °C in December 1998.
Precipitation amounts to
95 mm, distributed over 10 days.
The day lasts on average 9 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 67%.
The average wind speed is of
11.3 kph.
The average sea temperature is of
7.1 °C. Therefore, the sea is very cold for swimming.