If you don't have a huge budget to make your living room reflect the seasons, here are some easy ways you can change the decor by spending as little money as possible. And the changes are fairly easy, meaning your living room can look seasonal regardless of whether it is a blizzard outside or 95 degrees.

Pillows
Use sofa accent pillows with replaceable covers. In the fall and winter you will want to use darker fabrics, while in the spring and summer, you should use lighter and spring-like colors.

Candles
Use dark burgundy, blue and green ones in the colder months, but switch to white, ecru, or lighter colors of pink, yellow and blue. Don't forget to also change the candle holders or candle accent beads to reflect the season as well. Then store the ones you aren't using until next season.

Paintings
Dark oil paintings are best for winter months, but change to a lighter feeling watercolor painting for the summer.

Accent rugs
Using a dark oriental or tapestry rug? Swap it out for a lighter colored one for the summer months, or even a nice bamboo one to bring the feeling of the beach to your living room.

Frames
Swap out your dark wooden picture frames for bright white ones.

These are all simple things you can do to change the look of your living room to reflect what the weather is doing outside. And it will also help keep you from getting bored of seeing the same decor in your living room year in and year out.