It's going to feel as cold as -3C in parts of Lincolnshire tonight and Public Health England (PHE) have urged people to prepare for cold weather conditions and look out for those most at risk.
The Met Office has predicted a high chance of cold weather across the East Midlands from 6pm on Sunday January 19 to 6pm on Tuesday January 21.
Dr Owen Landeg, Principal Environmental Public Health Scientist at Public Health England, said: "Older people and those with heart and lung problems are at risk of getting sick in cold weather.
"Keep an eye out for those who may need help staying warm, ensure they wear lots of thin layers and have everything they need.
"Below 18 degrees, changes to the body mean that the risk of strokes, heart attacks and chest infections increase so heating homes to this temperature is particularly important to stay well."
Nick Silkstone, Deputy Chief Meteorologist at the Met Office said: "High pressure is in place across the UK this weekend bringing settled, mainly dry, but also cold weather for many.
"It will be colder than of late with temperatures dropping below freezing overnight and a chance of widespread frost but with sunny spells throughout the day.
"However, at the start of next week the chance of fog and cloud will increase across central and southern areas which will mean that it will also feel colder by day.
"Check updates to the forecast on the Met Office website or app."
Here's the weather across the county for the beginning of the week:
Lincoln
Clear skies this evening but lows of 1C this evening, feeling like -2C with ice and frost expected across the city.
Temperatures are to remain low until 9am on Monday reaching highs of 5C and sunny by mid afternoon.
Tuesday is expected to be slightly warmer with overcast skies and highs of 7C.
Boston
Similarly to Lincoln temperature in Boston is expected to hit the 1c mark and feel like -2.
Monday will bring clear skies with some winter sun before heading into a warmer, overcast Tuesday with highs of 7C.
Skegness
The winter freeze is also expected to be felt on the coast with an overnight temperature of 1C feeling like -2.
Monday will bring highs of 5C and sunny spells while Tuesday is expected to be warmer and overcast.
Spalding
Lows of 1C this evening as the weekend draws to a close.
Monday is expected to be bright with highs of 6C but feeling like 4C.
Tuesday much like the rest of the county is expected to be overcast with highs of 7C.
Gainsborough
Lows of 1C throughout tonight feeling like -1 with early morning ice and frost expetced.
Monday will be clear with highs of 5C
Grantham
Temperatures to feel like -2 throughout the night, albeit clear and ice and frost expected in the morning.
Monday is expected to be clear and sunny with highs of 6C. Tuesday is forecast to be overcast with Highs of 6C and lows of 4C.
Horncastle
Sunny weather changing to partly cloudy heading into this evening. Temperature forecast to be !C feeling like -2C.
Monday will bring clear, sunny weather with highs of 5C.
Tuesday's forecast is overcast with highs of 6C feeling like 4C.
Louth
Temperatures to feel like -3C tonight heading into Monday morning which will have cloudy weather changing to sunny intervals by late morning.
Highs of %C on Monday followed by &C on an overcast Tuesday.
Retford
Sunny intervals today with lows of 1C heading into the evening. Temperatures to feel like -2C at 3am on Monday morning.
Highs of 7C with clear bright skies throughout the day heading into an overcast Tuesday with highs of 8C.
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